Which is a key symptom of hyperglycemia?

Frequent urination is indeed a key symptom of hyperglycemia, which occurs when there is excess glucose in the bloodstream. When blood glucose levels are high, the kidneys work to filter out the excess glucose through urine. This leads to an increased volume of urine production, known as osmotic diuresis. As glucose is excreted in the urine, it pulls water along with it, resulting in more frequent urination. This symptom can help in identifying hyperglycemia and is often one of the first signs noted by individuals with this condition.

In addition to frequent urination, other symptoms of hyperglycemia may include increased thirst and dry mouth, which result from dehydration caused by the excessive loss of fluids. While options like excessive sweating, increased appetite, and dry skin can be associated with various conditions, they do not specifically highlight the primary mechanism of hyperglycemia as effectively as frequent urination does.