There is a hard lump in anus how to return a responsibility

A hard mass in the anus, depending on the circumstances, such as secretions, and a leak outside the anus, may be an anal fistula. A typical anal fistula is a complete, unobstructed tube, one end in the anal sinus, one end outside the anal margin, or in the rectal wall. An atypical anal fistula generally has an internal opening and no external opening, or both, but the central fistula is blocked or has only an external opening, and the internal opening cannot be found, or there is simply a induration. Prevention and treatment of constipation and diarrhea, perianal abscess and anal fistula prevention of the formation of important significance.