The thyroid gland is a small butterfly-shaped gland located in the front of the neck. The thyroid gland secretes thyroid hormones that are important to the body, and if too much thyroid hormone is secreted, hyperthyroidism, or hyperthyroidism, may occur. The common clinical manifestations are increased metabolism, sympathetic excitement and some accompanying symptoms. 1. Accelerated metabolic rate: Patients with hyperthyroidism increase their food intake due to excessive secretion of thyroid hormones; gastrointestinal activities are enhanced and bowel movements are increased; although food intake is increased, energy consumption of the body is increased and patients show weight loss, fear of heat and sweating, and individual patients show hypothermia. 2. Increased thyroid hormone stimulates sympathetic excitation: clinical manifestations include emotional tension, excitement, irritability, irritability, insomnia, etc. Some patients may also have difficulty swallowing and breathing, as well as jugular vein congestion and other symptoms. 3. Other symptoms: Some patients have abnormal glucose metabolism and elevated blood glucose, some show fatigue and weakness of the limbs and hypokalemic periodic paralysis. Some patients also have symptoms of endocrine and reproductive system, such as amenorrhea and irregular menstruation in women and hypogonadism in men. Some elderly patients do not have typical hyperthyroid symptoms and may even show the opposite, such as drowsiness, weakness and indifference, so they should be vigilant to avoid misdiagnosis. Usually patients with hyperthyroidism will have several of these symptoms, and it is recommended to seek timely medical attention according to the severity of the condition.