Fox odor is not contagious. Fox odor, also known as armpit odor and odorant sweat, has no clear pathogenic pathogens, is not an infectious disease and is not contagious. Fox odor is due to the large sebaceous glands in the armpits, sweat glands secretion function is too vigorous, resulting in a large number of unsaturated fatty acids, resulting in a pungent smell, if secondary to bacterial infection, the smell is greater. Fox odor occurs mostly in adolescence, especially in summer, more obvious after strenuous exercise, and in old age, with the reduction of sweat glands, the symptoms can gradually reduce or disappear. Fox odor is not contagious, mainly related to family inheritance, but not absolutely hereditary. In addition, fox odor is also related to race, the probability and severity of fox odor is much higher in whites than in yellows. Patients with fox odor should pay attention to bathing regularly to keep their underarms clean and dry. If the symptoms are more serious, or if medication is less effective, laser or surgical treatment may be considered.