The sweat secreted by the sweat glands in the armpits is subject to bacterial decomposition and emits an unpleasant odor called fox odor. Fox odor is generally congenital, related to genetics, but can also be formed later, especially the environment is conducive to the reproduction of bacteria in the armpit area, it is possible to form fox odor. 1, people who love sports, the armpit sweat glands secrete vigorously, blocking the sweat ducts and not timely cleaning, can not keep the local skin dry, sweat will reproduce bacteria to produce fox odor; 2, hot weather in summer, sweat secretion more, if you do not pay attention to cleaning, can not keep the local skin dry, sweat will reproduce bacteria to produce fox odor; 3, in pursuit of beauty, often plucking and scraping armpit hair and the use of topical drugs, constantly stimulating the underarm skin, so that the sweat gland hyperplasia hypertrophy, resulting in the secretion of sweat, sweat will reproduce bacteria to produce fox odor; 4, a large number of high-fat food and other causes abnormal sweating, stimulating the sebaceous glands lead to sweat secretion sweat, resulting in fox odor symptoms.