What is a primary symptom of Diabetes Mellitus?

Excessive thirst, also known as polydipsia, is a primary symptom of Diabetes Mellitus. This condition occurs due to the body's inability to regulate glucose levels effectively. When blood glucose levels become high, the kidneys work to filter and remove the excess sugar from the blood through urine. This process can lead to dehydration, prompting the individual to experience an increased sense of thirst as the body attempts to replenish lost fluids. Therefore, excessive thirst is a hallmark symptom that often signals the presence of uncontrolled diabetes and is closely associated with the metabolic imbalances that occur in the condition.