Which of the following symptoms is associated with hypothyroidism?

Cold intolerance is a well-known symptom associated with hypothyroidism, a condition where the thyroid gland does not produce enough thyroid hormones. This deficiency leads to a reduced metabolic rate, which can affect the body's ability to regulate temperature. As a result, individuals with hypothyroidism often find themselves feeling unusually cold compared to others. They may have difficulty warming up even in moderately cool environments due to the slowed metabolism and decreased heat production.

On the other hand, insomnia, rapid heartbeat, and increased sweating are typically symptoms indicative of hyperthyroidism, which is the opposite condition of hypothyroidism. In hyperthyroidism, an increased production of thyroid hormones speeds up the metabolism, often leading to symptoms like heat intolerance, increased heart rate, and excessive sweating. This contrast highlights how different thyroid conditions manifest distinct symptoms, making it crucial for healthcare providers to recognize these signs to correctly assess thyroid function.