A 2-centimeter-long strip of hard lumps around the anus with itching and sometimes flowing mucus may be an anal fistula, which can be treated with blockage or surgery. Anal fistula is a granulomatous tube around the anorectal area, including the internal mouth, external mouth and fistula three parts, is a perianal abscess after the collapse or drainage of the formation of the sequelae of the lesion. The clinical manifestation of anal fistula is mainly the external mouth can flow a small amount of secretion, the secretion can be purulent, bloody or mucous. In the examination of anal fistula, in the perianal region can be seen in the external mouth, intermittent discharge, the external mouth will appear when the closure of the local redness, swelling and pain, rupture of the discharge will be relieved, recurrent episodes. Check the body can also be felt near the anus a few centimeters long cord-like hard, this is the fistula fistula, from the outer mouth to the inner mouth to go, the direction of infection happens to be the inner mouth to the outer mouth of the infection to go. Fistula rarely heals on its own, and the main treatment methods are blockage and surgery. Plugging method is to flush the fistula after the fistula, with bioprotein gel from the external mouth injection to plug the fistula, can be used for simple anal fistula. Surgical treatments include fistulotomy, hanging thread therapy and anal fistulotomy, where the fistula is cut or removed to create an open wound to promote healing. If there is physical discomfort, please consult a doctor, clearly diagnosed as anal fistula lesions, it is recommended to give treatment as soon as possible, anal fistula is very difficult to self-healing, the sooner the treatment is more favorable to the body.