Anal discharge Perianal discharge or perianal dampness is usually associated with local inflammation of the skin or mucous membranes. The most common cause is organic disease, but also in many patients it is due to poor perianal hygiene. The odor of the discharge is often the main reason for patients to visit the clinic. The cause of the discharge requires a detailed examination of the site of its origin and accompanying symptoms such as itching, blood in the stool, pain, incontinence, prolapse, etc. The secretions can be classified as watery, mucus-like, pus-like, or stool-like and can come from the anal verge, anal canal, or rectum. Finger palpation, colonoscopy, microbiology, or blood tests can usually reveal the source of the discharge. Then, in many cases, the source of the discharge is difficult to examine. For example, fecal contamination of the underwear is the most common type of secretion, often without a clear source. Possible causes of secretions are as follows: 1, perianal: sweating, poor hygiene and cleanliness of the anal canal (poor wiping), skin scratches, eczema, anal fissures, acromegaly, tumors, abscesses, fistulas, boils, etc. 2.Anal canal: acromegaly, hemorrhoids, mucosal prolapse, anal fistula, abscess, incontinence, etc. 3, colorectal: rectal prolapse, inflammatory disease, isolated ulcer, adenoma, irritable bowel. These may be due to disease (skin lesions, anal fistula, rectal inflammation, rectal gonorrhea, hemorrhoidal prolapse, rectal prolapse) or surgery (complications of rectal or anal canal surgery). Watery discharge is often from the anal glands and is associated with anal inflammation or villous adenoma. Clear mucous discharge is often from the rectal epithelium and is associated with rectal prolapse and isolated ulcers. Brown discharge mixed with feces is often associated with poor sphincter closure. Purulent secretions often come from anal fistulas. Purulent hemorrhagic discharge is often colitis. Pale bloody discharge is often hemorrhoidal prolapse, mucosal prolapse or internal prolapse, and ulcerative colitis. Bloody exudate from the wound is common in postoperative mucosal prolapse of hemorrhoids. Bloody discharge with pruritus, burning or foreign body sensation, and pain is often associated with embedded prolapse. Uncommon causes include small abscesses in the posterior anal canal, absence of an obvious fistula at the anal verge, or abnormal anal gland secretion. Both of these conditions are difficult to examine. Glandular secretion may be the cause of a patient’s complaint of perianal dampness. Finally, the cause of perianal secretion is often not found. There may be a functional cause, such as mild incontinence. Systemic disease (e.g., diabetes mellitus) is also a cause. Clinical examination or rectal manometry may reveal mild incontinence.