Fox odor is armpit odor, suddenly have armpit odor may be parietal secretion of sweat glands increased, improper diet and other factors. 1. Increased secretion of parietal sweat glands: If it is hot and stuffy summer, emotional stress, strenuous exercise, etc., may lead to increased secretion of parietal sweat glands, under the action of the local bacteria, may produce unsaturated fatty acids as well as ammonia, which will emit an unpleasant odor. 2. Improper diet: If you eat too much garlic, onions, chili peppers, fatty meats and other spicy stimulating greasy food, it may also cause the body to increase the secretion of oil, which can also induce bad breath. There are many causes of armpit odor, it is recommended that patients need to pay attention to personal hygiene, go to a regular hospital, regular treatment under the guidance of the doctor.