What symptom is indicative of hyperglycemia?

Excessive thirst is a key symptom indicative of hyperglycemia, which refers to an elevated level of glucose in the blood. When blood sugar levels rise significantly, the body attempts to eliminate the excess glucose through urine, a process that leads to increased urination (polyuria). This loss of fluid results in dehydration, which typically causes symptoms such as excessive thirst (polydipsia) as the body signals the need for fluid replacement.

While light-headedness, acetone odor on breath, and tachycardia can be associated with various conditions, excessive thirst specifically arises due to the physiological response to high blood sugar levels. It is important for individuals experiencing hyperglycemia to recognize this symptom and seek appropriate medical help, as it can signal a more serious condition such as diabetic ketoacidosis if left untreated.