Odor is a peculiar smell emitted by the bacteria in the armpit after decomposing some substances in sweat gland secretion and producing unsaturated fatty acids, which has genetic factors. In terms of treatment, the first thing is to keep the armpit skin clean and dry, the clothes should be ventilated, and you should take a bath in time after sweating. In terms of drug treatment, the first is local treatment, with the goal of cleaning, sterilization, astringency and antiperspiration. The commonly used ones are 3% formaldehyde solution, 2% alum solution, and the commercially available drugs such as Sislan Xialu and Yueyueqing. For more serious patients, surgical resection of the apocrine gland can be considered.