Is there a reason that early A.M. blood sugar would be high?
A. Some patients have high before-breakfast blood glucose levels because of hormones that are released in the early part of sleep (called the Dawn Phenomenon). Typically, the blood glucose level rises between 4 AM and 8 AM. Check your blood glucose level in the middle of the night (around 3 AM). If your blood sugar is high, you may be experiencing the dawn phenomenon. If it is low, it may be a rebound hyperglycemia (high blood glucose) causing your high blood glucose levels in the morning. This occurs if you have low blood glucose levels at night and your body is releasing hormones as a defense mechanism against low blood sugar.
