The dawn phenomenon, sometimes referred to as the dawn effect, can cause an abnormal blood sugar level in the early morning hours. Sources vary regarding the time that you may experience the dawn phenomenon, with some sources indicating that it can occur before dawn, while other sources indicate that it can occur between 2 am and 8 am.

Do you have diabetes and have questions or concerns about the dawn phenomenon? Perhaps you think that you are one of only a few people that experiences it. The truth is that up to 50 percent of people who have diabetes also have the dawn phenomenon.

The waning insulin overnight while you sleep likely causes your blood sugar to rise, which results in high morning readings. The Somogyi Effect occurs when your blood sugar level falls too low during the night. Your body responds by producing more glucose, which leads to your high morning reading.

The occasional high morning glucose reading will have little effect on your A1C, which measures your blood glucose levels over time. If you discover that you have consistently high glucose readings when you wake up, you need to let your doctor know as soon as possible.

Do not skip your evening meal, but try eating earlier in the evening. Avoid evening snacks that are high in carbs. Take a walk after you eat dinner or engage in another form of exercise. Let your doctor know if these tips do not work so that the doctor can provide an assessment and recommend any changes to your treatment.