Anal fissures are a painful condition that need medical attention. initial therapy for an anal fissure is medical in nature, and more than 80 of acute anal fissures resolve without further therapy. The goals of treatment are to relieve the constipation and to break the cycle of hard bowel movement, associated pain, and worsening constipation. It also has a potential for the treatment of perianal fistulae and epitheliotropic lymphoma in dogs (2,3). Three types of glandular tumors, namely perianal gland (or circumanal or hepatoid) tumor, apocrine gland tumor of the anal sac, and apocrine gland tumor commonly occur in the perianal area of the dog ( 4 ). Many factors can cause anal swelling, or a swollen anus, which can be itchy or painful. Is any follow-up treatment necessary for an anal fistula? Most fistulas respond well to surgery. After the surgery, your surgeon may recommend that you soak the affected area in a warm bath, known as a sitz bath, and that you take stool softeners or laxatives for a week. Anal fissures happen due to certain occurrences, such as childbirth or constipation, or due to some medical conditions. An anal fissure is a small tear or crack in the lining of the anus.