Patients with hyperthyroidism tend to sweat easily. The thyroid gland is an important endocrine gland in the body and its role is to secrete thyroid hormones. Thyroid hormones affect the body’s metabolic process, speeding up the metabolism of substances and affecting the heat production process, resulting in increased heat production and therefore increased sweating. When hyperthyroidism occurs, the concentration of thyroid hormones in the blood increases, putting the patient in a high metabolic state. Therefore, typical hyperthyroidism is characterized by symptoms of hypermetabolism such as fear of heat, excessive sweating, excessive eating, easy hunger, weight loss, increased stool frequency, and agitation. Treatment of hyperthyroidism mainly includes oral antithyroid medication, surgery and iodine-131 therapy. When hyperthyroidism is controlled, the above mentioned hypermetabolic symptoms will gradually improve, and the symptoms of hyperthyroidism that make patients sweat easily will also improve.