Fox odor is a condition in which the sweat glands in the armpits are more active and secrete a large amount of sweat that is decomposed by bacteria to produce a strange smell, which occurs in the armpits and other areas where sweat does not evaporate easily. There are several disease characteristics as follows: first, the armpits of the feet or other places prone to sweating, the secretion of sweat is vigorous and easy to sweat; second, the sweat has a foul odor and emits a pungent smell to the surrounding area while sweating a lot; third, the sweat secretion of the patient stains the clothes mostly with a yellowish color and leaves a long-lasting smell on the clothes; fourth, the ears are greasier, the secretion of the sweat glands in the external ear canal is softer and thinner, showing a greasy state, and the ear canal is more moist than normal people. The appearance of fox odor, it is recommended to pay attention to the usual cleanliness and hygiene to prevent inflammation, and if necessary, excision surgery.