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How do I know the reason for high blood sugar in the morning?

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To learn the reason for your high morning blood sugar, your doctor will likely ask you to check your levels between 2 a.m. and 3 a.m. for a few nights in a row.

If it's consistently low during this time, the Somogyi effect is probably the cause. If it's normal or high during this time period, the dawn phenomenon is more likely the reason.

Diabetes Stops Here: "Why All the Morning Highs?"

Mayo Clinic: "What is the dawn phenomenon that some people with diabetes experience? Can anything be done about it?"

American Diabetes Association: "Diabetes Myths."

Diabetes Forecast: "Why Is My Blood Glucose So High in the Morning?"

diabetes.co.uk: "Glucagon."

Reviewed by Michael Dansinger on April 23, 2017

Diabetes Stops Here: "Why All the Morning Highs?"

Mayo Clinic: "What is the dawn phenomenon that some people with diabetes experience? Can anything be done about it?"

American Diabetes Association: "Diabetes Myths."

Diabetes Forecast: "Why Is My Blood Glucose So High in the Morning?"

diabetes.co.uk: "Glucagon."

Reviewed by Michael Dansinger on April 23, 2017

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How do I treat high blood sugar in the morning if I have diabetes?

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THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for general informational purposes only and does not address individual circumstances. It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on to make decisions about your health. Never ignore professional medical advice in seeking treatment because of something you have read on the WebMD Site. If you think you may have a medical emergency, immediately call your doctor or dial 911.

    This tool does not provide medical advice. See additional information.

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