Normal people have a smell in their armpits, but the smell is not very strong. The armpits of normal people can be secreted by sweat glands, when sweating is more serious, if not timely bathing or changing clothes, there will be a very unpleasant smell. The normal person’s armpit has large sweat glands and small sweat glands, of which the large sweat glands secrete mainly protein, while the small sweat glands secrete mainly water and electrolytes. If you sweat a lot due to strenuous exercise and do not take a shower or change your clothes on the same day, an odor will appear in your armpits, but this odor is very different from the smell of fox, which is usually caused by genetic factors and is heavier in the summer when the weather is hot. If the special smell appears without fox odor, you can take a bath and change clothes to eliminate the odor; if it is caused by fox odor, you need to treat it with topical products, surgery and physical therapy.