Perianal abscess stool does not hurt, there is no blood, eat normally, the possible clinical causes are perianal abscess early, anal fistula and so on. 1. early perianal abscess: perianal abscess refers to the acute purulent infection of the soft tissues around the anal canal and rectum or the peripheral space, mostly due to the formation of abscesses due to the infection of the anal gland obstruction. The disease in the early stage may only appear in the local mass, pain symptoms are relatively mild or not accompanied by pain, but also will not cause bleeding. 2. anal fistula: the situation refers to the anal canal or rectum and perineal skin connected to the chronic, infected channel, usually also perianal rectal abscess breakout or incision and drainage of the sequelae of the lesion, such as fistula without acute infection, not the formation of a new abscess, there will be no pain and other symptoms. Clinical manifestations of the main anal fistula external or intermittent outflow of a small amount of purulent, bloody, mucous secretion, in the case of drainage is not obvious pain symptoms. It is recommended that such cases should be diagnosed and treated as soon as possible in the hospital anorectal surgery, to avoid prolonged aggravation of the condition or cause adverse effects on the body.