DefinitionBy Mayo Clinic Staff
High blood sugar (hyperglycemia) affects people who have diabetes. Several factors can contribute to hyperglycemia in people with diabetes, including food and physical activity choices, illness, nondiabetes medications, or skipping or not taking enough glucose-lowering medication.
It's important to treat hyperglycemia, because if left untreated, hyperglycemia can become severe and lead to serious complications requiring emergency care, such as a diabetic coma. In the long term, persistent hyperglycemia, even if not severe, can lead to complications affecting your eyes, kidneys, nerves and heart.
April 18, 2015
- Hyperglycemia (high blood glucose). American Diabetes Association. http://www.diabetes.org/living-with-diabetes/treatment-and-care/blood-glucose-control/hyperglycemia.html. Accessed March 24, 2015.
- Your guide to diabetes: Type 1 and type 2. National Institute of Diabetes and Digestive and Kidney Diseases. http://diabetes.niddk.nih.gov/dm/pubs/type1and2/index.aspx. Accessed March 24, 2015.
- McCulloch DK. Management of persistent hyperglycemia in type 2 diabetes mellitus. http://www.uptodate.com/home. Accessed March 24, 2015.
- Kitabchi AE, et al. Diabetic ketoacidosis and hyperosmolar hyperglycemic state in adults: Treatment. http://www.uptodate.com/home. Accessed March 24, 2015.
- Castro MR (expert opinion). Mayo Clinic, Rochester, Minn. March 24, 2015.
- Steele AM, et al. Prevalence of vascular complications among patients with glucokinase mutations among prolonged, mild hyperglycemia. Journal of the American Medical Association. 2014;311(3):279.
- Standards of medical care in diabetes — A position statement of the American Diabetes Association. Diabetes Care. 2015;38(suppl):S33.