Most people think of food, exercise, and medications as the main factors that affect blood sugar. But there is another important influence that is often overlooked: stress.
Whether it's a busy week at work, a family emergency, poor sleep, financial concerns, an illness, or even excitement, stress can affect how your body regulates glucose. If you've ever noticed your blood sugar running higher during stressful periods—even when you're eating the same foods—you aren't imagining it. Stress can have a real and measurable effect on blood sugar.
What Happens in Your Body During Stress?
Stress is your body's natural response to a challenge or perceived threat. When your brain senses stress, it activates the "fight-or-flight" response, releasing several hormones including cortisol, epinephrine (adrenaline), norepinephrine, and glucagon.
These hormones help prepare your body for action. One way they do this is by signaling your liver to release stored glucose into the bloodstream, providing your muscles with a quick source of energy.
For someone without diabetes, the pancreas usually releases enough insulin to keep blood sugar within a healthy range. For people with diabetes, that response may not work as effectively, allowing blood sugar to rise.
Emotional Stress vs. Physical Stress
Not all stress is the same. Both emotional and physical stress can affect blood sugar.
Emotional stress
Work deadlines, school exams, family conflict, anxiety, depression, financial concerns, and major life changes can all increase stress hormone levels and influence blood sugar.
Physical stress
Your body also experiences stress during physical illnesses and injuries — infections, fever, surgery, broken bones, significant pain, burns. Physical stress often has an even greater effect on blood sugar because the body releases additional hormones while fighting illness or healing. See our sick-day rules for diabetes.
Can Stress Raise Blood Sugar?
Yes. For many people with diabetes, stress causes blood sugar to increase. Stress hormones stimulate the liver to release glucose while also making the body's cells less responsive to insulin. As a result, more glucose enters the bloodstream, less glucose moves into cells, and blood sugar may remain elevated longer than expected.
Can Stress Ever Lower Blood Sugar?
It can. Some people eat less when they're stressed, while others may become more physically active without realizing it. Stress can also affect medication schedules, appetite, and daily routines. These changes may contribute to low blood sugar in some situations, particularly for people taking insulin or medications that can cause hypoglycemia. Everyone responds differently.
Stress Can Affect More Than Hormones
Stress also influences daily habits. When people feel overwhelmed, they may be more likely to skip meals, eat more processed or comfort foods, sleep poorly, exercise less, forget medications, and check blood sugar less often. These changes can affect glucose just as much as stress hormones themselves.
What About Poor Sleep?
Sleep and stress are closely connected. Even one night of poor sleep may increase insulin resistance, raise stress hormone levels, increase appetite, and make blood sugar more difficult to manage. Improving sleep habits is often an important part of diabetes management.
How Can You Tell If Stress Is Affecting Your Blood Sugar?
Looking at one glucose reading isn't enough. Instead, look for patterns. Does my blood sugar rise during busy workdays? Is my glucose higher when I'm anxious? Do stressful family situations affect my readings? Are my numbers different during vacations or weekends?
A continuous glucose monitor (CGM) can be especially helpful because it allows you to compare glucose trends with your daily routine. Recognizing these patterns helps you understand how stress affects your body.
Healthy Ways to Manage Stress
You cannot eliminate stress completely. However, healthy coping strategies may improve both your emotional well-being and your diabetes management.
Stay physically active
Regular physical activity supports overall health and may help reduce stress. Even a short walk can be beneficial.
Get enough sleep
Aim for consistent, high-quality sleep whenever possible. Good sleep supports healthy hormone balance and glucose regulation.
Practice relaxation techniques
Many people benefit from deep breathing, meditation, mindfulness, gentle stretching, yoga, or prayer and quiet reflection. Different techniques work for different people.
Stay connected
Talking with trusted family members, friends, or support groups can make stressful situations feel more manageable. You don't have to face diabetes alone.
Keep your diabetes routine
Stress often disrupts healthy habits. Whenever possible, take medications as prescribed, eat regular meals, stay hydrated, continue monitoring your glucose, and attend scheduled healthcare appointments. Maintaining your routine can help reduce the impact of stress on blood sugar.
Don't Blame Yourself
Everyone experiences stress. Occasional high blood sugar during stressful periods does not mean you've failed. Instead of focusing on individual readings, pay attention to overall trends and continue following your diabetes care plan. Managing diabetes is a long-term process, and some days will naturally be more challenging than others.
Frequently Asked Questions
Can anxiety raise blood sugar?
Yes. Anxiety activates many of the same stress hormones that can increase blood sugar. Not everyone responds the same way, but many people notice higher glucose levels during periods of anxiety.
Why is my blood sugar higher during workdays?
Work-related stress, changes in routine, missed meals, poor sleep, and reduced physical activity can all contribute to higher blood sugar. Looking for patterns over time can help identify possible triggers.
Can meditation lower blood sugar?
Meditation does not directly lower blood sugar. However, because it may reduce stress for some people, it can become one part of an overall healthy diabetes management plan.
Will reducing stress cure my diabetes?
No. Stress management supports diabetes care, but it does not replace medications, healthy eating, physical activity, or other treatments recommended by your healthcare provider.
When Should You Contact Your Healthcare Provider?
Contact your healthcare provider if your blood sugar remains consistently above your target range during stressful periods, stress is making it difficult to manage your diabetes, you experience frequent episodes of hypoglycemia, you have symptoms of depression or anxiety that interfere with daily life, or you're unsure whether changes in your blood sugar are related to stress or another medical condition. Your healthcare provider can help identify contributing factors and recommend appropriate support.
Seek Immediate Medical Care If
Seek emergency medical attention if you experience persistent very high blood sugar with vomiting, rapid breathing, severe dehydration, confusion, loss of consciousness, a seizure, or thoughts of harming yourself or feeling that you are in immediate danger. These symptoms require prompt medical evaluation.
The Bottom Line
Stress is a normal part of life, but it can have a significant effect on blood sugar. By triggering the release of stress hormones and influencing everyday habits like eating, sleeping, and medication routines, both emotional and physical stress can make diabetes more difficult to manage.
The key is not to eliminate stress completely—an impossible goal—but to recognize how it affects your body, maintain healthy daily routines, and work with your healthcare provider when you notice persistent changes in your blood sugar. Understanding the connection between stress and glucose can help you respond with confidence rather than frustration.