The 'dawn effect' (high blood sugar in the morning)

The "dawn effect," also called the "dawn phenomenon," is the term used to describe an early-morning increase in blood sugar (glucose) — usually between 4 a.m. and 8 a.m. — in people with diabetes. The exact cause isn't known. However, it can be responsible for persistently elevated fasting blood sugar and glycated hemoglobin levels.

To prevent or correct high blood sugar levels in the morning, your doctor may recommend:

• Adjusting your dosage of medication or insulin
• Switching to a different medication