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Hyperglycemia is when the body has too much glucose (sugar) in the blood. It is a common complication of diabetes and can occur when a person does not take enough insulin, eats too much food, or is under stress. If left untreated, hyperglycemia can lead to serious health problems, including heart disease, stroke, kidney failure, and nerve damage.

Hyperglycemia is diagnosed when a person's blood glucose level is higher than normal. Normal blood glucose levels are typically between 70 and 140 mg/dL. A person is considered to have hyperglycemia when their blood glucose level is higher than 180 mg/dL.

The symptoms of hyperglycemia can vary from person to person but may include increased thirst, frequent urination, fatigue, blurred vision, and slow-healing wounds. If left untreated, hyperglycemia can lead to serious health problems, such as diabetic ketoacidosis (DKA), a life-threatening condition in which the body produces too much acid.

Treatment for hyperglycemia depends on the underlying cause. If the cause is related to diabetes, a person may need to adjust their insulin dose or change their diet. Other treatments may include exercise, stress management, and medications.

It is important to monitor blood glucose levels regularly to prevent hyperglycemia. People with diabetes should talk to their healthcare provider about how often they should check their blood glucose levels.

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  • American Diabetes Association. (2020). Hyperglycemia (High Blood Glucose). Retrieved from
  • Mayo Clinic. (2020). Hyperglycemia. Retrieved from