Why Do Blood Sugar Levels Drop At Night

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Blood Sugar: What Causes High Blood Sugar Levels In The Morning

There are two reasons why your blood sugar levels may be high in the morning – the dawn phenomenon and the Somogyi effect. The dawn phenomenon is the end result of a combination of natural body changes that occur during the sleep cycle and can be explained as follows: Your body has little need for insulin between about midnight and about 3:00 a.m. (a time when your body is sleeping most soundly). Any insulin taken in the evening causes blood sugar levels to drop sharply during this time. Then, between 3:00 a.m. and 8:00 a.m., your body starts churning out stored glucose (sugar) to prepare for the upcoming day as well as releases hormones that reduce the body's sensitivity to insulin. All of these events happen as your bedtime insulin dose is also wearing off. These events, taken together, cause your body's blood sugar levels to rise in the morning (at "dawn"). A second cause of high blood sugar levels in the morning might be due to the Somogyi effect (named after the doctor who first wrote about it). This condition is also called "rebound hyperglycemia." Although the cascade of events and end result – high blood sugar levels in the morning – is the same as in the dawn phenome Continue reading >>

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Popular Questions

  1. diabeticmidfielder

    Of Low Blood Sugar and Nightime

    After talking to a friend with diabetes recently, I have been thinking about dropping low during the night and how scary that can be. I'm lucky enough to wake up, without exception, whenever I drop below 55 or 60.
    Has anyone had serious issues with dropping low during the night and what do you do to make sure that doesn't happen without running high during the night and in the morning?

  2. oak park way

    my husband always drop in the early morning hours i can tell because he is talking silly and not himself what can i do to

  3. cm - 15868

    I too suffer from my blood sugar dropping at night. Have you tried having a snack before bedtime? I started having a snack before bedtime and it has worked for me. Try having 1 slice of bread with peanut butter, cheese or any other protein.
    Good Luck

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