What is a common symptom of hyperglycemia?

A common symptom of hyperglycemia is a fruity odor to breath, which is typically associated with diabetic ketoacidosis (DKA). In conditions where the body has an excessive amount of sugar in the bloodstream and begins to break down fat for energy, ketones are produced. These ketones can lead to metabolic acidosis, resulting in a distinctive sweet or fruity smell on the person's breath. This symptom is a clear sign of the body attempting to regulate high blood glucose levels, often occurring in individuals with diabetes when their insulin is insufficient or absent.

The other symptoms listed, such as confusion, mild shakiness, and headache, can relate to hypoglycemia (low blood sugar) or other health issues, making them less specific for hyperglycemia. While people experiencing hyperglycemia may feel fatigued or have other symptoms, the fruity breath is particularly indicative of a more serious condition stemming from prolonged hyperglycemia.