What symptom is indicative of hypothyroidism?

Cold intolerance is a classic symptom indicative of hypothyroidism because the thyroid hormone plays a crucial role in regulating metabolism and body temperature. In individuals with hypothyroidism, the underproduction of thyroid hormones leads to a slowed metabolic rate, making it difficult for the body to generate and maintain heat. As a result, these individuals often experience increased sensitivity to cold environments, feeling cold even when others may feel comfortable. This symptom is a direct consequence of the reduced metabolic rate and reflects the overall impact of thyroid hormone deficiency on the body’s ability to thermoregulate, differentiating it from other symptoms like weight gain or increased heart rate, which can be influenced by various factors and are not exclusive to hypothyroidism.