Underarm sweating belongs to hyperhidrosis, the common causes include physiological factors, metabolic and endocrine diseases, drug factors, infections and febrile diseases, etc. The solution is to remove the causative factors after clarifying the causes of the disease, and then reasonably choose medication, physical therapy, surgical treatment and other ways to treat. 1. Physiological factors: there are sweat glands in the armpits, which will stimulate the sweat glands to secrete a large amount of sweat when exercising, in a hot environment, emotional excitement, and eating spicy food, resulting in excessive sweating in the armpits. This is a normal phenomenon, no need to treat, pay attention to the cleanliness of the armpits can be. 2. Metabolic and endocrine diseases: such as hyperthyroidism, hyperadrenalism, diabetes and other diseases, will lead to systemic hypermetabolism, easy to appear armpit sweating, this situation needs to treat the primary disease, usually after the primary disease treatment, the symptoms of excessive sweating can be relieved. Aluminum oxide solution can be used externally to improve local symptoms. 3. Drug factors: such as the application of antipyretic and analgesic, cholinergic drugs and adrenaline drugs and other drugs, easy to lead to excessive local sweating. Usually after stopping the medication, it will get better on its own. 4. Infectious febrile diseases: such as tuberculosis, pneumonia, malaria and other diseases, need to actively treat the primary disease. If necessary, local topical aluminum oxide solution to improve symptoms. If the above treatment can not be relieved, physical therapy, such as fractional microneedle radiofrequency treatment, surgical treatment, etc., can also be used to alleviate the symptoms. It is recommended to seek timely medical treatment for the above symptoms, and it is recommended that patients use medication in strict compliance with the doctor’s prescription, and not blindly self-medication, to avoid delaying the condition.