Generally speaking, you can judge whether it’s bad breath or sweat by the way it appears, the smell, and the location. 1. The way of appearing: Fox odor usually always appear, but most of the cases of sweat odor is due to the human body secretes too much sweat, no timely cleaning caused by the special smell. 2. Odor: Fox odor in most cases in the armpits near the location of the more pungent odor, while sweat odor is a generalized sour and rotten smell. 3. Location: In most cases, the odor appears near the armpits, and may also appear in the umbilicus, nipples, anus and other parts of the patient. Sweat odor can occur in any part of the body that secretes sweat. It is recommended that patients go to the hospital for examination in a timely manner, under the guidance of a professional physician to identify the symptoms, if the fox odor, should be timely targeted treatment.