The Dawn Effect is the early-morning increase in blood glucose, usually between 4 a.m. and 8 a.m. in persons with diabetes. The exact cause isn't known, however, it can be responsible for persistently elevated fasting blood glucose and HbA1c levels. It is not caused by a previous low during the night and treatment involves limiting fat in the diet at dinnertime and in bedtime snacks. Changes in insulin doses during the night are often required and should be made by your doctor.
The Somogyi Effect is triggered by low blood glucose that causes a release of hormones including glucagon that raise blood glucose too much. Low blood glucose occurs most often near an insulin peak so you may need to test your blood glucose levels more often for a few days to see where your lows are beginning.
To prevent or correct high blood glucose levels in the morning, your doctor may recommend:
Adjusting your dosage of medication or insulin
Switching to a different medication
Changing the time or fat content of your bedtime snack
Testing your blood glucose around 3.a.m.
Knowledge is the key to control
