Sweating in the armpits can be considered a normal physiological phenomenon, fox odor, hyperhidrosis and so on. 1. Normal physiological phenomenon: If it is a hot summer, or after a large number of sports, armpit sweating is considered a normal physiological phenomenon, the sweat glands in the armpit are more developed, so more than the rest of the body sweating will be more. 2. Fox odor: and sweat gland secretion by bacterial decomposition has a relationship, the main symptom of fox odor is that there will be a kind of pungent odor, often accompanied by the symptoms of excessive sweating, manifested in the armpit area of increased sweating. 3. Hyperhidrosis: hyperhidrosis and autonomic nervous system dysfunction caused by the sweat glands are too strong, mainly manifested in local or generalized skin sweating. There may be other reasons for sweaty armpits, so it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment.