Body odor is also known as armpit odor, bromhidrosis, etc. It is the sweat excreted by the apocrine glands (also called apocrine glands) in the patient's armpits, vulva, corners of the mouth, etc. The fatty acids are higher than those of ordinary people, light yellow, and thicker; when the fatty acids reach a certain concentration, they are decomposed by bacteria on the surface of the skin, mainly staphylococci, to produce unsaturated fatty acids and emit a foul smell. It is similar to the smell discharged from the anus of a fox, so it is often called body odor. Most patients with body odor have a family history of inheritance. Statistics show that more than 60% have a clear genetic tendency. In addition, the anthropological tendency of body odor is particularly obvious. White, black, and brown people suffer from body odor, which accounts for the vast majority. Therefore, it is rare for them to have no body odor. Body odor is not a disease in their population. In the West, the English word for body odor (B.O) body odor means body odor. Since the body odor (body odor) of the yellow race is extremely light, once someone has a heavier body odor (obvious body odor), people around them will feel particularly pungent, and it is generally considered to be a disease. Suffering from body odor will form a heavy psychological burden, affecting marriage, employment, further education, making friends, etc. Many patients have abnormal personality and thinking because of this, and body odor has really become a disease---a mental disease.