Which of the following is NOT a symptom of hyperglycaemia?

Light headedness is not typically recognized as a direct symptom of hyperglycaemia. Hyperglycaemia, which means high blood sugar levels, primarily manifests through symptoms related to the body's attempt to manage elevated glucose levels.

Extreme thirst occurs because high blood sugar can lead to dehydration; the body draws water from tissues to dilute the excess glucose in the bloodstream, triggering the sensation of thirst.

Frequent urination is another common symptom, as the kidneys attempt to eliminate the excess glucose through urine, leading to increased urine production.

Blurred vision can also be associated with hyperglycaemia. When blood glucose levels are high, changes in the lens of the eye can occur, affecting the ability to focus clearly.

In contrast, while light headedness can occur in various situations, such as low blood sugar (hypoglycaemia) or due to dehydration, it is not a classic symptom of elevated blood sugar. Therefore, identifying light headedness as the answer highlights the need to accurately differentiate between the manifestations of hyperglycaemia and other conditions.