Sweating can be caused by obesity, developed sweat glands, or hyperthyroidism. 1. Obesity: If you are obese, sweating is usually a normal phenomenon. Because the obese people’s basal metabolism is generally higher, more fat content, faster heat dissipation, so especially sweating. 2. Developed sweat glands: some people have more developed sweat glands, in the same environment is more able to sweat, if it does not affect the daily life, usually do not need treatment. However, if sweating is particularly heavy, affecting daily life and causing abnormal hyperhidrosis, treatment is needed. 3. Hyperthyroidism: If the thyroid gland produces too much hormone, it can cause hyperthyroidism, which can lead to excessive sweating, accompanied by weight loss, palpitations (rapid heartbeat, often accompanied by panic), irritability and other symptoms. There are many causes of excessive sweating, and if it is serious, it is advisable to go to the hospital in time to find out the cause and take measures to treat it.