What condition is associated with weight gain and severity of cold sensitivity?

Weight gain and cold sensitivity are key characteristics associated with hypothyroidism. In this condition, the thyroid gland produces insufficient levels of thyroid hormones, which play a vital role in regulating metabolism and energy levels in the body. When these hormone levels are low, the body's metabolic rate decreases, often leading to weight gain. Additionally, individuals with hypothyroidism may experience increased sensitivity to cold because thyroid hormones help regulate the body’s temperature. The sluggish metabolism and reduced ability to generate body heat can contribute to this cold sensitivity.

In contrast, the other conditions listed are typically linked to excess thyroid hormone levels, which can lead to symptoms such as weight loss and heat intolerance rather than weight gain and cold sensitivity. Understanding the role of thyroid hormones is crucial in recognizing these metabolic effects and how they manifest in different thyroid-related conditions.