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Which of these symptoms is indicative of type 1 diabetes?

  1. Excessive thirst

  2. High blood pressure

  3. Joint pain

  4. Frequent headaches

The correct answer is: Excessive thirst

Excessive thirst, also known as polydipsia, is a key symptom of type 1 diabetes. In this condition, the body is unable to produce enough insulin, which leads to high blood sugar levels. As blood sugar rises, it causes the kidneys to work harder to filter and absorb the excess glucose. This process leads to increased urine production, which can result in dehydration. Consequently, the individual experiences heightened thirst in an attempt to replenish lost fluids. The other options, while they may indicate other health issues, are not specifically hallmark symptoms of type 1 diabetes. High blood pressure can be associated with a range of conditions, joint pain may arise from various musculoskeletal disorders, and frequent headaches can be linked to numerous causes including stress or tension but do not directly relate to type 1 diabetes.