Which of the following is NOT a symptom of diabetes?

Frequent headaches are not typically classified as a direct symptom of diabetes. The common symptoms of diabetes generally include increased thirst, extreme fatigue, and poor eyesight, which stem from elevated blood sugar levels and the body's inability to effectively utilize glucose.

Increased thirst occurs due to high blood sugar levels causing dehydration, as the kidneys work to excrete excess glucose through urine. Extreme fatigue can result from the body not being able to convert sugar into energy effectively, leading to feelings of lethargy. Poor eyesight, often manifesting as blurred vision, is also linked to diabetes due to changes in fluid levels in the eyes resulting from fluctuating blood sugar levels.

While some people with diabetes may experience headaches, these are not considered a classic symptom of the condition itself. Headaches can be caused by various factors unrelated to diabetes, complicating their connection to the disease. Thus, it is more accurate to identify frequent headaches as a potential secondary effect or symptom related to other factors rather than a defining symptom of diabetes.