Wasting can be caused by a variety of reasons, including lifestyle changes and various diseases. Common diseases that cause wasting include hyperthyroidism, diabetes, malignancy, chronic inflammation, and end-stage diseases. Hyperthyroidism is usually referred to as persistent hyperthyroidism, which is the result of excessive secretion of thyroid hormones by the body’s largest endocrine gland, the hyperthyroid gland. The clinical manifestations of hyperthyroidism include a more pronounced fear of heat and excessive sweating than normal people, with some people sweating even after a little activity in the middle of winter. Some people eat a lot of food, some people eat several bowls at a meal, and they get hungry quickly. Despite eating a lot of weight loss, some people can lose a few dozen pounds. Panic, especially after the activity is obvious, the slightest activity will feel panic. Irritability, easily angered. Increased frequency of stools, most hyperthyroid patients have 2-3 bowel movements per day, shaped or pasty. Weakness. Some young and middle-aged men may also experience significant weakness in the limbs, and in severe cases, inability to move the limbs, with recurrent episodes. Men may also have decreased sexual function, and women may have changes in menstruation and infertility. Some elderly patients with hyperthyroidism have atypical symptoms, and some only show unexplained weight loss. Since the establishment of our thyroid specialty, we have been seeing dozens of hyperthyroid patients every day, ranging in age from a few years old to over seventy years old. In conclusion, hyperthyroidism is a common cause of weight loss, so go to a regular hospital thyroid specialist when you have these symptoms.