Normal anus can also have stinky phenomenon. The most common reason for anal odor is due to defecation without wiping the remaining stool on the anus, coupled with the secretion of the perianal glands will lead to local odor, considered to be normal, may not be wiped clean reason, pay attention to local cleanliness and hygiene, diligent cleaning, diligent change of underpants, diligent bathing. It may also be due to perianal abscess caused by anal fistula, its external mouth in the anus, a small amount of feces from the fistula outflow, so the smell is heavy, cleaning can not be improved, you can pay attention to perianal hygiene, keep the local dry, so as to improve the symptom, you can use iodine povidone solution, potassium permanganate solution coated with the affected area, to help the treatment, and can be given an intravenous anti-inflammatory infusion therapy if necessary. If repeated attacks, it is recommended to hospital anorectal surgery, pay attention to local hygiene after surgery, with potassium permanganate solution sitz bath, regular medication to avoid infection.