Can Stress Cause Low Blood Sugar?

For most people, acute stress tends to increase blood sugar because the body releases glucose for a “fight-or-flight” response. However, stress may indirectly lead to low blood sugar when it causes skipped or delayed meals, poor sleep, extra physical activity, alcohol intake, or irregular diabetes medication use.

People with diabetes—especially those using insulin or certain glucose-lowering medicines—are at higher risk of hypoglycemia. Stress can make glucose levels less predictable, and low sugar itself can trigger anxiety-like symptoms such as shakiness, sweating, a fast heartbeat, and irritability.

Symptoms to Watch

Low blood sugar may cause:

• Shakiness, sweating, or a racing heart

• Sudden hunger, weakness, or dizziness

• Irritability, anxiety, confusion, or poor concentration

• Headache and fatigue

Because anxiety and hypoglycemia can feel similar, check your blood glucose if you have a meter or CGM rather than assuming it is stress.cdc

What to Do

• Eat regular, balanced meals with protein, fiber, and healthy fats; avoid relying only on sugary snacks.

• If you have diabetes, follow your clinician’s plan for insulin or medication, especially during illness, poor sleep, or major stress.

• Treat confirmed low blood sugar promptly with a fast-acting carbohydrate source, as advised by your healthcare professional.

• Support stress management with regular movement, adequate sleep, breathing exercises, and realistic workload boundaries.mayoclinic

Seek urgent medical help for confusion, fainting, seizures, or inability to keep food or fluids down.