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Definition of Low blood sugar

  • Medical Author:
    William C. Shiel Jr., MD, FACP, FACR

    Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.

Low blood sugar: A low blood level of the sugar glucose. Also called hypoglycemia.

Hypoglycemia is only significant when it is associated with symptoms. It has many causes including drugs such as insulin, liver disease, surgical absence of the stomach, pre-diabetes, and rare tumors that release excess insulin.

Reviewed on 12/21/2018

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