How to Recognize and Manage Hypoglycemia and Hyperglycemia

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Managing blood sugar levels is one of the most critical aspects of living with diabetes. Hypoglycemia, or low blood sugar, is common in people who have diabetes, especially Type 1 diabetes, while hyperglycemia affects individuals when glucose levels rise too high. Understanding how to recognize and manage both conditions can prevent serious complications, improve daily functioning, and enhance overall quality of life for people with diabetes.

This comprehensive guide explores the symptoms, causes, treatment strategies, and prevention methods for both hypoglycemia and hyperglycemia. Whether you’re newly diagnosed with diabetes, caring for someone with the condition, or looking to optimize your diabetes management plan, this article provides evidence-based information to help you navigate these common but potentially dangerous blood sugar fluctuations.

Understanding Blood Sugar Regulation

Before diving into hypoglycemia and hyperglycemia, it’s important to understand how the body normally regulates blood sugar. Glucose is the primary metabolic fuel for the brain under physiologic conditions, and the brain requires a steady supply of arterial glucose for adequate metabolic function. Normally, the body maintains the level of glucose in the blood within a range of about 70 to 110 milligrams per deciliter (mg/dL), or 3.9 to 6.1 millimoles per liter (mmol/L) of blood.

In people without diabetes, the body uses a complex system of hormones—primarily insulin and glucagon—to keep blood sugar within this narrow range. When you eat, your blood sugar rises, and your pancreas releases insulin to help cells absorb glucose for energy or storage. Between meals, when blood sugar drops, the pancreas releases glucagon to signal the liver to release stored glucose.

In people with diabetes, this delicate balance is disrupted. Type 1 diabetes occurs when the pancreas produces little or no insulin, while Type 2 diabetes involves insulin resistance and eventually decreased insulin production. Both conditions can lead to episodes of hypoglycemia and hyperglycemia, requiring careful management and monitoring.

What Is Hypoglycemia?

Hypoglycemia happens when the level of sugar (glucose) in your blood drops below the range that’s healthy for you, and it’s also called low blood sugar or low blood glucose. Hypoglycemia is often defined by a plasma glucose concentration below 70 mg/dL; however, signs and symptoms may not occur until plasma glucose concentrations drop below 55 mg/dL.

The 2025 Standards of Care in Diabetes, from the American Diabetes Association (ADA), lists glucose levels in hypoglycemia as follows: Level 1 includes glucose levels between less than 70 mg/dL and at or above 54 mg/dL, Level 2 involves glucose levels less than 54 mg/dL, and Level 3 is characterized by altered mental and physical status requiring assistance for treatment, regardless of glucose level.

Who Is at Risk for Hypoglycemia?

Hypoglycemia is common in people with diabetes, especially people who take insulin to manage the condition, with one study finding that 4 in 5 people with Type 1 diabetes and nearly half of all people with Type 2 diabetes who take insulin reported a low blood sugar episode at least once over a four-week period. People with Type 2 diabetes who take meglitinide or sulfonylurea oral diabetes medications are also at an increased risk for low blood sugar.

Among patients with diabetes receiving treatment, patients with type 1 diabetes are 3 times as likely to experience hypoglycemia than patients with type 2 diabetes. The average person with type 1 diabetes has low blood glucose levels up to twice a week.

While hypoglycemia is most common in people with diabetes, it can occasionally occur in people without the condition. After certain types of bariatric surgery, such as gastric bypass surgery, your body absorbs sugars very quickly, which stimulates excess insulin production, and this can then cause hypoglycemia.

Recognizing the Symptoms of Hypoglycemia

Recognizing hypoglycemia symptoms early is crucial for prompt treatment and preventing severe complications. If your blood sugar drops below the healthy range, it causes certain symptoms like shakiness and a faster heartbeat and can be life-threatening if it goes too low. This is because your brain needs a continuous supply of glucose to function properly, and without enough glucose, your brain can’t function.

Hypoglycemia symptoms can be divided into two categories: autonomic (adrenergic) symptoms and neuroglycopenic symptoms.

Autonomic Symptoms

These symptoms are caused by the release of the “fight-or-flight” hormone called epinephrine (adrenaline), and it is the release of adrenaline that causes the symptoms of low blood glucose such as thumping heart, sweating, tingling, and anxiety. Common autonomic symptoms include:

  • Sweating or clamminess
  • Trembling or shakiness
  • Rapid or pounding heartbeat
  • Anxiety or nervousness
  • Irritability
  • Tingling sensations, particularly around the mouth
  • Pale skin

Neuroglycopenic Symptoms

The glycemic threshold for neuroglycopenic symptoms is typically around 54 mg/dL. These symptoms result from the brain not receiving enough glucose and include:

  • Confusion or difficulty concentrating
  • Dizziness or lightheadedness
  • Blurred or impaired vision
  • Weakness or fatigue
  • Headache
  • Hunger
  • Difficulty speaking or slurred speech
  • Coordination problems
  • Unusual behavior or personality changes

In more severe cases, hypoglycemia may result in convulsions and loss of consciousness. If it’s left untreated, severe low blood sugar can be life-threatening.

Hypoglycemia Unawareness

A particularly dangerous condition called hypoglycemia unawareness can develop in some people with diabetes. Sometimes, hypoglycemia doesn’t cause any symptoms, and this happens when you have too many episodes of low blood sugar—over time, your body gets used to these episodes and stops sending out its usual alarm signals, such as hunger or shakiness, and as a result, you might not notice when your blood sugar gets low.

This exposes patients to a vicious cycle of frequent hypoglycemia events and shifts glycemic thresholds for symptoms to lower plasma glucose concentrations close to levels that cause cognitive failure. In terms of epidemiology, hypoglycemic unawareness occurs in 20–40% of type 1 diabetics.

It’s possible to get your early warning symptoms back by avoiding any, even mild, low blood glucose for several weeks, as this helps your body re-learn how to react to low blood glucose levels. If you suspect you have hypoglycemia unawareness, it’s essential to work closely with your healthcare provider to adjust your treatment plan and blood glucose targets.

Causes of Hypoglycemia in People with Diabetes

Understanding what causes hypoglycemia can help you prevent future episodes. Common causes include:

Most hypoglycemia cases occur in patients with diabetes who are undergoing therapeutic intervention with meglitinides, sulfonylureas, or insulin, and drugs are the most common cause of hypoglycemia. Taking too much insulin or diabetes medication, or taking it at the wrong time relative to meals, can cause blood sugar to drop too low.

Dietary Factors

If you take insulin or oral diabetes medicine, be consistent about the amount you eat, and also be consistent about the timing of your meals and snacks. Skipping meals, eating less than usual, or delaying meals after taking diabetes medication can lead to hypoglycemia.

Physical Activity

Exercise increases glucose uptake by muscles and can lower blood sugar levels. If you boost your physical activity, you may need to adjust your medicine or eat more snacks, with the adjustment depending on the blood sugar test results, the type and length of activity, and what medicines you take.

Alcohol Consumption

Drinking alcohol on an empty stomach can cause hypoglycemia, and alcohol also can cause delayed hypoglycemia hours later, which makes it even more important to check your blood sugar.

How to Treat Hypoglycemia: The 15-15 Rule

You need to treat hypoglycemia as soon as possible by consuming carbohydrates. The standard treatment approach is known as the “15-15 rule,” which provides a systematic method for treating low blood sugar safely and effectively.

If your blood sugar is below 70 mg/dL (or the goal set by your doctor), eat or drink 15-20 grams of fast-acting carbohydrates. Fast-acting carbohydrates are quickly absorbed and can raise blood sugar levels within 15 minutes. Examples include:

  • Glucose tablets (follow package instructions, typically 3-4 tablets)
  • Glucose gel
  • 4 ounces (half a cup) of fruit juice
  • 4 ounces of regular (not diet) soda
  • 1 tablespoon of sugar, honey, or corn syrup
  • Hard candies, jellybeans, or gumdrops (check the label for 15 grams of carbohydrates)

Avoid snacks that contain a lot of fat (such as chocolate) or fiber (such as beans) because these slow down sugar absorption, and don’t be tempted to eat too many carbs, as this could accidentally cause your blood sugar to spike.

After consuming fast-acting carbohydrates, wait 15 minutes and then check your blood sugar again. If it’s still below 70 mg/dL, consume another 15 grams of fast-acting carbohydrates. Repeat this process until your blood sugar reaches a safe level. Once your blood sugar is back in the normal range, eat a small snack or meal containing protein and complex carbohydrates to help stabilize your blood sugar and prevent another drop.

Treating Severe Hypoglycemia

Severe hypoglycemia occurs when blood sugar drops so low that you cannot treat yourself and need assistance from another person. The treatment for severe hypoglycemia is an injection of glucagon, which is a hormone that causes the liver to release sugar into the blood.

Teach people you trust how to recognize symptoms of hypoglycemia—if others know what symptoms to look for, they might be able to alert you to early symptoms, and it’s also important that family members and close friends know how to help you in case of an emergency.

Glucagon is available in several forms, including injectable and nasal spray formulations. After giving someone else a glucagon treatment, you should roll them over on their side so that if they vomit, they don’t choke, and then call 911 for emergency help. If the person has passed out, they should wake up within 15 minutes of receiving the glucagon, and if they don’t wake up during that time, give them another injection or nasal spray.

Preventing Hypoglycemia

Prevention is always better than treatment when it comes to hypoglycemia. Here are evidence-based strategies to reduce your risk:

Monitor Blood Sugar Regularly

Depending on your treatment plan, you may need to check and record your blood sugar level many times each week or each day, and this is the only way to make sure that your blood sugar level stays within your target range. The only sure way to know whether you are experiencing low blood glucose is to check your with a glucose meter or CGM.

Take Medications as Prescribed

Measure medicine carefully and take it on time, and take any diabetes medicine as recommended by your healthcare professional. Never adjust your insulin or medication doses without consulting your healthcare provider.

Maintain Consistent Eating Patterns

Patients should be advised to have fairly consistent exercise and dietary habits to avoid drastic changes in hour-to-hour blood glucose measurements. Don’t skip meals or snacks, especially if you’ve taken insulin or diabetes medication.

Keep Treatment Readily Available

Patients should monitor themselves for signs or symptoms of hypoglycemia and always have sources of glucose (eg, hard candy and fruit juice) immediately available. Carry glucose tablets, gel, or another fast-acting carbohydrate source with you at all times.

Keep a Hypoglycemia Journal

Keep a journal of times when you get low blood sugar, noting what you ate, any diabetes medicines that you took and any physical activity you did—this can help you and your care team find patterns as to why you might get hypoglycemia, and it can help your team find ways to prevent bouts of low blood sugar.

Wear Medical Identification

Carry some form of diabetes identification so that in an emergency others can see that you have diabetes—use a medical identification necklace or bracelet and wallet card.

What Is Hyperglycemia?

In people who have diabetes, glucose tends to build up in the bloodstream—this condition is called hyperglycemia, and it may reach dangerously high levels if it is not treated properly. Hyperglycemia is blood glucose greater than 125 mg/dL while fasting and greater than 180 mg/dL 2 hours postprandial.

Hyperglycemia, defined as a blood glucose greater than 140 mg/dl (7.8 mmol/l), is reported in 22-46% of non-critically ill hospitalized patients. Hyperglycemia is quite common in people with diabetes, and learning to recognize and manage it is essential for preventing both short-term and long-term complications.

Recognizing the Symptoms of Hyperglycemia

Symptoms of hyperglycemia develop slowly over several days or weeks, and the longer blood sugar levels stay high, the more serious symptoms may become. But some people who’ve had type 2 diabetes for a long time may not show any symptoms despite high blood sugar levels.

Hyperglycemia can affect people of any age and can cause a range of symptoms, including excessive thirst, hunger, fatigue, and/or an urge to urinate larger amounts than usual. Common symptoms include:

  • Frequent urination (polyuria), especially at night
  • Increased thirst (polydipsia)
  • Increased hunger (polyphagia)
  • Blurred vision
  • Fatigue or weakness
  • Headaches
  • Difficulty concentrating
  • Dry mouth
  • Dry or itchy skin
  • Slow-healing cuts or wounds
  • Frequent infections
  • Unintended weight loss (in severe cases)

Recognizing early symptoms of hyperglycemia can help identify and treat it right away. The sooner you address high blood sugar, the better you can prevent complications.

Causes of Hyperglycemia

Hyperglycemia in diabetes can occur for many reasons. Understanding these causes can help you take steps to prevent high blood sugar episodes.

Insufficient Insulin or Medication

Many factors can contribute to hyperglycemia, including not using enough insulin or other diabetes medication, not injecting insulin properly or using expired insulin. Missing doses of medication or insulin can quickly lead to elevated blood sugar levels.

Dietary Factors

Eating more carbohydrates than your meal plan allows, or consuming foods high in sugar, can cause blood sugar to rise. If more glucose enters the bloodstream—if you eat carbohydrate-rich food, for example—the blood glucose levels climb even higher.

Illness and Stress

Illness or stress can trigger hyperglycemia because hormones your body makes to fight illness or stress can also cause blood sugar to rise, and you may need to take extra diabetes medication to keep blood glucose in your target range during illness or stress.

Lack of Physical Activity

Physical activity helps your body use insulin more effectively and lowers blood sugar levels. When you’re less active than usual, your blood sugar may rise.

Other Medications

Certain medications, including corticosteroids, some diuretics, and certain psychiatric medications, can raise blood sugar levels. Always inform your healthcare provider about all medications you’re taking.

Complications of Untreated Hyperglycemia

Extensive data indicates that inpatient hyperglycemia, in patients with or without a prior diagnosis of diabetes, is associated with an increased risk of complications and mortality. Both acute and chronic complications can result from poorly managed high blood sugar.

Acute Complications: Diabetic Ketoacidosis (DKA)

If you fail to treat hyperglycemia, a condition called ketoacidosis (diabetic coma) could occur. Ketoacidosis develops when your body doesn’t have enough insulin—without insulin, your body can’t use glucose for fuel, so your body breaks down fats to use for energy, and when your body breaks down fats, waste products called ketones are produced.

Your body cannot tolerate large amounts of ketones and will try to get rid of them through the urine, but unfortunately, the body cannot release all the ketones and they build up in your blood, which can lead to ketoacidosis, and ketoacidosis is life-threatening and needs immediate treatment.

In some cases, people with diabetes who have hyperglycemia can develop a complication called diabetic ketoacidosis (DKA), and DKA is a life-threatening condition (DKA is most commonly associated with type 1 diabetes, but can occur in people with type 2 as well).

Symptoms of DKA include:

  • Nausea and vomiting
  • Abdominal pain
  • Fruity-smelling breath
  • Rapid, deep breathing
  • Confusion or difficulty concentrating
  • Extreme thirst
  • Frequent urination
  • Fatigue

If hyperglycemia isn’t treated, it can cause toxic acids, called ketones, to build up in the blood and urine, and this condition is called ketoacidosis. If you experience symptoms of DKA, seek emergency medical care immediately.

Hyperosmolar Hyperglycemic State (HHS)

HHS is another acute complication that primarily affects people with Type 2 diabetes. It involves extremely high blood sugar levels (often above 600 mg/dL) combined with severe dehydration, but without significant ketone production. HHS develops more slowly than DKA but is equally serious and requires immediate medical attention.

Long-Term Complications

Keeping blood sugar in a healthy range can help prevent many diabetes-related complications, and long-term complications of hyperglycemia that isn’t treated include cardiovascular disease, nerve damage (neuropathy), kidney disease (nephropathy), eye damage (retinopathy), and foot problems.

Chronic hyperglycemia can cause severe complications, and the complications are usually irreversible, with several studies showing that untreated chronic hyperglycemia shortens lifespans and worsens the quality of life.

How to Manage Hyperglycemia

Managing hyperglycemia involves both immediate treatment to bring blood sugar down and long-term strategies to prevent future episodes.

Immediate Treatment

If you take insulin to manage diabetes, injected insulin is the main way to treat hyperglycemia episodes—everyone requires different insulin doses, and you and your healthcare provider will determine which dose is best for you to treat and prevent high blood sugar.

You can often lower your blood glucose level by exercising, however, if your blood glucose is above 240 mg/dl, check your urine for ketones—if you have ketones, do not exercise, as exercising when ketones are present may make your blood glucose level go even higher.

When treating hyperglycemia, it’s important to:

  • Check your blood sugar level to confirm it’s high
  • Review what may have caused the high reading (missed medication, illness, stress, dietary factors)
  • Follow your healthcare provider’s sick-day plan if you’re ill
  • Check for ketones if your blood sugar is above 240 mg/dL
  • Stay hydrated by drinking water
  • Contact your healthcare provider if blood sugar remains high despite treatment

Long-Term Management Strategies

The treatment goals of hyperglycemia involve eliminating the symptoms related to hyperglycemia and reducing long-term complications—glycemic control in patients with type 1 diabetes is achieved by a variable insulin regimen along with proper nutrition, while patients with type 2 diabetes are managed with diet and lifestyle changes as well as medications, and type 2 diabetes also may be managed on oral glucose-lowering agents.

Monitor Blood Sugar Regularly

Depending on your treatment plan, you may check and record your blood sugar level several times a week or several times a day, and careful monitoring is the only way to make sure that your blood sugar level stays within your target range.

People with diabetes use at-home blood sugar testing (using a glucose meter) to monitor their blood sugar and check for hyperglycemia—if you use continuous glucose monitoring (CGM), your device may alert you to high blood sugar, and as this technology can sometimes be inaccurate, it’s important to check your blood sugar with a glucose meter if the CGM reading doesn’t match how you feel.

Follow Your Medication Plan

Take your medication as directed, and if you develop hyperglycemia often, your health care provider may adjust the dosage or timing of your medication. Never adjust your medications without consulting your healthcare provider.

Adopt a Healthy Eating Plan

Follow your diabetes eating plan—it helps to eat smaller portions and avoid sugary beverages and frequent snacking. Work with a registered dietitian to create a meal plan that helps you maintain stable blood sugar levels while meeting your nutritional needs.

Exercise Regularly

Regular exercise is often an effective way to control blood sugar, but don’t exercise if you have ketones in your urine, as this can drive your blood sugar even higher. Regular aerobic exercise (i.e., involving large muscle groups and rhythmic in nature) improves glycemic management in adults with type 2 diabetes, resulting in less daily time in hyperglycemia and reductions of ∼7 mmol/mol (∼0.6%) in HbA1c.

Aim for at least 150 minutes of moderate-intensity aerobic activity per week, spread over at least three days, with no more than two consecutive days without exercise. Include resistance training at least twice per week.

Manage Stress

Stress hormones can raise blood sugar levels. Incorporate stress-management techniques such as deep breathing, meditation, yoga, or other relaxation practices into your daily routine.

Stay Hydrated

Drinking plenty of water helps your kidneys flush out excess sugar through urine. Aim for at least 8 glasses of water per day, and increase your intake when blood sugar is high.

When to Seek Medical Help

Your blood glucose levels stay above 240 milligrams per deciliter (mg/dL) (13.3 millimoles per liter (mmol/L)) and you have symptoms of ketones in your urine—this requires immediate medical attention. Also seek emergency care if you experience:

  • Persistent vomiting
  • Shortness of breath
  • Fruity-smelling breath
  • Confusion or altered mental status
  • Extreme weakness or fatigue
  • Abdominal pain

If you have trouble keeping your blood sugar within your target range, schedule an appointment to see your health care provider, as your provider can help you make changes to better manage your diabetes.

Blood Sugar Monitoring: The Foundation of Management

Whether you’re managing hypoglycemia, hyperglycemia, or both, regular blood sugar monitoring is essential. Monitoring helps you understand how food, physical activity, medications, stress, and illness affect your blood sugar levels.

Types of Blood Sugar Monitoring

Self-Monitoring of Blood Glucose (SMBG)

Traditional blood glucose meters require a small blood sample, typically obtained by pricking your finger with a lancet. This method provides a snapshot of your blood sugar at a specific moment in time. Regular blood glucose monitoring (BGM) may help with self-management and medication adjustment, particularly in individuals taking insulin, BGM plans should be individualized, and people with type 2 diabetes and the health care team should use the monitoring data in an effective and timely manner.

Continuous Glucose Monitoring (CGM)

Technologies such as intermittently scanned or real-time continuous glucose monitoring (CGM) provide more information and may be useful for people with type 2 diabetes, particularly in those treated with insulin. CGM devices use a small sensor inserted under the skin to measure glucose levels in interstitial fluid continuously throughout the day and night. They can alert you to high or low blood sugar trends before they become dangerous.

Hemoglobin A1C Testing

The A1C test measures your average blood sugar level over the past 2-3 months. How often you need the A1C test depends on the type of diabetes you have and how well you’re managing your blood sugar—most people with diabetes receive this test 2 to 4 times a year. This test helps you and your healthcare provider assess your overall diabetes management and make adjustments to your treatment plan.

Target Blood Sugar Ranges

Target blood sugar ranges vary depending on individual factors such as age, duration of diabetes, presence of complications, and overall health status. General targets for most adults with diabetes include:

  • Before meals: 80-130 mg/dL (4.4-7.2 mmol/L)
  • Two hours after starting a meal: Less than 180 mg/dL (10.0 mmol/L)
  • A1C: Less than 7% for most adults (individualized targets may vary)

Your healthcare provider will work with you to establish personalized targets based on your specific situation. Your target blood sugar range may differ, especially if you’re pregnant or you have other health problems that are caused by diabetes, and your target blood sugar range may change as you get older.

Lifestyle Strategies for Blood Sugar Management

Beyond medication and monitoring, lifestyle factors play a crucial role in managing both hypoglycemia and hyperglycemia.

Nutrition and Meal Planning

A well-planned diet is fundamental to blood sugar management. Key principles include:

  • Carbohydrate counting: Understanding how different carbohydrates affect your blood sugar helps you make informed food choices
  • Consistent meal timing: Eating meals and snacks at regular times helps prevent blood sugar fluctuations
  • Balanced meals: Include a combination of carbohydrates, protein, and healthy fats at each meal to promote stable blood sugar
  • Portion control: Managing portion sizes helps prevent blood sugar spikes
  • Fiber intake: High-fiber foods slow glucose absorption and help maintain steady blood sugar levels
  • Limit processed foods and added sugars: These can cause rapid blood sugar spikes

Working with a registered dietitian who specializes in diabetes can help you develop a personalized meal plan that fits your lifestyle, preferences, and blood sugar goals.

Physical Activity and Exercise

There is a greater emphasis on weight management as part of the holistic approach to diabetes management, and physical activity behaviors significantly impact cardiometabolic health in type 2 diabetes. Exercise offers numerous benefits for blood sugar management:

  • Increases insulin sensitivity, allowing cells to use glucose more effectively
  • Helps lower blood sugar levels during and after activity
  • Aids in weight management
  • Reduces cardiovascular risk factors
  • Improves overall well-being and quality of life

Resistance exercise (i.e., using your own body weight or working against a resistance) also improves blood glucose levels, flexibility, and balance. Include both aerobic exercise and resistance training in your routine for optimal benefits.

Important considerations for exercise and blood sugar:

  • Check your blood sugar before, during (for prolonged activity), and after exercise
  • Carry fast-acting carbohydrates during exercise in case of hypoglycemia
  • Stay hydrated
  • Adjust insulin or medication doses as recommended by your healthcare provider
  • Be aware that exercise can lower blood sugar for up to 24 hours after activity

Sleep and Blood Sugar

Quality sleep is increasingly recognized as an important factor in blood sugar management. Poor sleep can:

  • Increase insulin resistance
  • Affect hormones that regulate appetite and blood sugar
  • Make it harder to maintain healthy eating habits
  • Reduce motivation for physical activity

Aim for 7-9 hours of quality sleep per night. Establish a consistent sleep schedule, create a relaxing bedtime routine, and address any sleep disorders such as sleep apnea, which is common in people with diabetes.

Stress Management

Chronic stress can significantly impact blood sugar levels through the release of stress hormones like cortisol and adrenaline. Effective stress management techniques include:

  • Mindfulness meditation
  • Deep breathing exercises
  • Yoga or tai chi
  • Regular physical activity
  • Adequate sleep
  • Social support and connection
  • Professional counseling when needed
  • Time management and setting realistic goals

Patients with diabetes are more prone to depression than those without diabetes, and this is more so in newly diagnosed diabetics and young patients due to significant lifestyle changes that are needed. Don’t hesitate to seek mental health support if you’re struggling with the emotional aspects of diabetes management.

Special Situations and Considerations

Managing Blood Sugar During Illness

Illness can significantly affect blood sugar levels, often causing them to rise even if you’re eating less. Illness or infections can cause your blood sugar to rise, so it’s important to plan for these situations—talk to your health care provider about creating a sick-day plan.

A sick-day plan should include:

  • How often to check blood sugar and ketones
  • Which medications to continue and which to adjust
  • What to eat and drink when you don’t feel well
  • When to contact your healthcare provider
  • When to seek emergency care

Never stop taking insulin, even if you can’t eat normally. Your body needs insulin during illness, sometimes even more than usual.

Alcohol and Blood Sugar

Alcohol can have complex effects on blood sugar. It can cause hypoglycemia, especially when consumed without food, because it interferes with the liver’s ability to release glucose. However, mixed drinks containing sugary mixers can cause hyperglycemia.

If you choose to drink alcohol:

  • Never drink on an empty stomach
  • Limit consumption to moderate amounts (one drink per day for women, two for men)
  • Check blood sugar before, during, and after drinking, and before bed
  • Wear medical identification
  • Inform companions about hypoglycemia symptoms and treatment
  • Be aware that alcohol can cause delayed hypoglycemia up to 24 hours later

Traveling with Diabetes

Traveling requires extra planning to manage blood sugar effectively:

  • Pack more diabetes supplies than you think you’ll need
  • Carry supplies in your carry-on luggage
  • Bring a letter from your healthcare provider explaining your need for diabetes supplies
  • Research medical facilities at your destination
  • Adjust insulin doses for time zone changes with your provider’s guidance
  • Keep snacks readily available for treating hypoglycemia
  • Stay hydrated, especially during air travel
  • Check blood sugar more frequently than usual

Working with Your Healthcare Team

The management of diabetes and its complications requires a multi-disciplinary team, with following specialties involved in the management of diabetes and its complications. Effective diabetes management requires collaboration with various healthcare professionals.

Your Healthcare Team May Include:

  • Primary care physician: Coordinates overall care and manages general health issues
  • Endocrinologist: Specializes in diabetes and hormone disorders
  • Certified diabetes care and education specialist (CDCES): Provides education on diabetes self-management
  • Registered dietitian nutritionist (RDN): Develops personalized meal plans and nutrition guidance
  • Pharmacist: Advises on medications, potential interactions, and proper use
  • Ophthalmologist: Monitors and treats diabetes-related eye complications
  • Podiatrist: Manages foot care and prevents complications
  • Mental health professional: Addresses emotional and psychological aspects of living with diabetes
  • Exercise physiologist: Develops safe and effective exercise programs

Communicating with Your Healthcare Team

Create a record of metered glucose values and give your health care provider a written or printed record of your blood glucose values, times and medication—using the record, your health care provider can recognize trends and offer advice on how to prevent hyperglycemia or adjust your medication to treat hyperglycemia.

Effective communication with your healthcare team includes:

  • Keeping detailed records of blood sugar readings, medications, meals, and physical activity
  • Preparing questions before appointments
  • Being honest about challenges you’re facing
  • Reporting any symptoms or concerns promptly
  • Asking for clarification when you don’t understand something
  • Discussing your goals and preferences for treatment
  • Following up on recommended tests and appointments

Emerging Technologies and Treatments

Diabetes management continues to evolve with new technologies and treatment approaches that can help prevent and manage both hypoglycemia and hyperglycemia more effectively.

Advanced Insulin Delivery Systems

Insulin pump therapy delivers rapid-acting insulin continuously throughout the day and night, mimicking the body’s natural insulin release more closely than multiple daily injections. Modern pumps can be programmed with multiple basal rates and can calculate insulin doses based on carbohydrate intake and current blood sugar levels.

Automated insulin delivery (AID) systems, sometimes called “artificial pancreas” systems, combine continuous glucose monitoring with insulin pump therapy. These systems automatically adjust insulin delivery based on real-time glucose readings, significantly reducing the burden of diabetes management and improving time in target range while reducing hypoglycemia risk.

Newer Medications

Because of its high efficacy in lowering HbA1c, minimal hypoglycemia risk when used as monotherapy, weight neutrality with the potential for modest weight loss, good safety profile, and low cost, metformin has traditionally been recommended as first-line glucose-lowering therapy for the management of type 2 diabetes, however, there is ongoing acceptance that other approaches may be appropriate, and notably, the benefits of GLP-1 RA and SGLT2i for cardiovascular and renal outcomes have been found to be independent of metformin use.

Newer medication classes offer additional benefits beyond blood sugar control, including cardiovascular and kidney protection, making them important options for many people with Type 2 diabetes.

Smart Insulin Pens

Smart insulin pens can track insulin doses, timing, and amounts, helping prevent dosing errors and providing data that can be shared with healthcare providers. Some connect to smartphone apps that integrate insulin data with blood sugar readings and carbohydrate intake.

Living Well with Diabetes

It’s important to know that you can live a healthy life with diabetes. While managing hypoglycemia and hyperglycemia requires ongoing attention and effort, millions of people with diabetes live full, active, and healthy lives.

Key Takeaways for Success

  • Education is empowering: Understanding your condition and how to manage it gives you control
  • Consistency matters: Regular monitoring, medication adherence, and lifestyle habits are foundational
  • Prevention is possible: Many episodes of hypoglycemia and hyperglycemia can be prevented with proper planning
  • Early intervention is crucial: Recognizing and treating blood sugar problems early prevents complications
  • Support is available: You don’t have to manage diabetes alone—healthcare professionals, family, friends, and support groups can help
  • Technology can help: Modern diabetes management tools can make blood sugar control easier and more effective
  • Flexibility is important: Your management plan should fit your lifestyle and adapt as your needs change
  • Self-compassion is essential: Diabetes management isn’t perfect—learn from challenges and keep moving forward

Essential Action Steps

  • Monitor blood sugar levels as recommended by your healthcare provider
  • Take all medications as prescribed and at the correct times
  • Follow a balanced, consistent eating plan
  • Engage in regular physical activity appropriate for your fitness level
  • Keep fast-acting carbohydrates available at all times for treating hypoglycemia
  • Wear medical identification indicating you have diabetes
  • Educate family members and close friends about hypoglycemia symptoms and treatment
  • Keep emergency glucagon on hand if you’re at risk for severe hypoglycemia
  • Attend all scheduled healthcare appointments
  • Get regular screening for diabetes complications
  • Seek support when you need it—whether medical, emotional, or practical

Conclusion

Recognizing and managing hypoglycemia and hyperglycemia are essential skills for anyone living with diabetes. Your best bet is to practice good diabetes management and learn to detect hyperglycemia so you can treat it early—before it gets worse. The same principle applies to hypoglycemia—early recognition and prompt treatment prevent serious complications.

While the challenges of managing blood sugar fluctuations can seem overwhelming at times, remember that effective management is achievable with the right knowledge, tools, and support. Monitoring your blood sugar regularly and seeing your diabetes healthcare provider regularly can help you properly manage diabetes and hyperglycemia. The same vigilance helps prevent and manage hypoglycemia.

If you’re feeling overwhelmed with diabetes management, talk to your healthcare provider—together, you can formulate a plan to get closer to your management goals. Every person’s diabetes journey is unique, and finding the right combination of strategies that work for you is a process that evolves over time.

By understanding the symptoms, causes, and treatments for both hypoglycemia and hyperglycemia, you’re taking an important step toward better health and quality of life. Stay informed, stay vigilant, and remember that you have the power to manage your diabetes effectively and live well.

Additional Resources

For more information about managing hypoglycemia and hyperglycemia, consider exploring these reputable resources:

Remember to consult with your healthcare provider before making any changes to your diabetes management plan. The information in this article is for educational purposes and should not replace professional medical advice tailored to your individual situation.