After shaving armpit hair odor may be sweat, local infection, fox odor and other causes. 1. Sweat odor: If you sweat a lot and don’t clean up the sweat in time, it will easily lead to deposition in the armpit, thus forming a bad smell, which is a normal sweat odor. 2. local infection: it may be due to the hair follicle damage caused by shaving the armpit hair, thus secondary bacterial infection caused, it may also be due to the usual not pay attention to the local hygiene caused by bacterial infection, which is easy to form a bad smell, accompanied by redness and swelling and pain. 3. Fox odor: it is due to the secretions of the sweat glands in the top of the armpit are decomposed by bacteria to produce a special odor, even through the bath can not be well relieved. After shaving armpit hair odor if excluded is normal sweat odor, should promptly go to the hospital, with the doctor to take treatment.