Morning highs are typically caused by one of two things: The Somogyi effect (also called rebound hyperglycemia) or Dawn Phenomenon.
With the Somogyi effect, you may be experiencing hypoglycemia (or low blood glucose episodes) during the night. In reaction to these untreated lows, your body releases stress hormones and the subsequent high blood glucose levels that you’re seeing in the morning. The Dawn Phenomenon is an early-morning (4:00 to 8:00 AM) natural rise in blood glucose levels that is caused by a release of hormones as your body prepares to meet the day.
Sometimes these morning highs can be avoided by a bedtime snack at night or other adjustments in insulin or medication. Talk to your doctor about any unexplained irregularities in blood glucose levels and how you might adjust your treatment plan accordingly.
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