An anal fissure is a small tear in the lining of the anus, which can cause pain and discomfort during bowel movements. This condition often results from passing hard stools or straining during defecation. Symptoms may include sharp pain, bleeding, and itching around the anal area. Treatment for an anal fissure typically involves increasing fiber intake, staying hydrated, and using topical medications to promote healing. In some cases, a doctor may recommend procedures to relax the anal sphincter muscle if conservative measures do not provide relief.