The causes of fox odor are mainly related to the following factors: 1, genetic factors: fox odor patients often have a family history; 2, sweat secretion: the axillary area has a top-secreting sweat glands, androgen activity is enhanced after puberty, the sweat glands secrete vigorously, and sweat increases in the axillary area; 3, microbial infection: the axillary area has a large number of bacteria, fungi and other microorganisms, which can decompose sweat and produce odor. Removal method: If the symptoms are relatively light, you can use 1:5000 potassium permanganate solution to wash every day to kill microorganisms; use 5% alum solution externally to reduce sweat secretion. If the symptoms are more severe, surgical treatment can be performed after the age of 18, using small incisions for subcutaneous trimming to remove all the sweat glands and hair follicles in the armpit area.