What Causes Anal Pain?

Anorectal pain refers to discomfort localized within the anal canal and the surrounding anorectal region. It is a common symptom associated with numerous anorectal disorders, including anal fissures, anal sinusitis, thrombosed external hemorrhoids, perianal abscesses, incarcerated internal hemorrhoids, edematous external hemorrhoids, anorectal cancer, foreign body injuries to the anus, and postoperative pain following anorectal surgery.

Causes of Anorectal Pain

1. Anal Fistula

Patients with an anal fistula commonly experience a sensation of heaviness or mild pain in the anal region, which intensifies during defecation due to mechanical compression of the fistula tract—often resulting in a burning pain. Therefore, if an individual experiences anal pain accompanied by copious purulent or mucoid discharge with a foul odor, prompt medical evaluation is warranted.

2. Hemorrhoids

Hemorrhoids frequently develop due to prolonged sitting or unhealthy dietary habits, and are often associated with anal pain. Surgical excision may be indicated for symptomatic hemorrhoids. Additionally, patients should maintain regular dietary habits, consume ample fresh fruits and vegetables, avoid prolonged sitting, and engage in appropriate physical activity.

3. Anal Fissure

Anal fissures typically cause cyclical anal pain, especially after defecation. The passage of stool irritates and mechanically widens the ulcerated fissure, thereby exacerbating pain. Pain intensity usually subsides gradually once defecation is complete.

4. Perianal Abscess

Perianal abscesses most commonly arise from obstruction of perianal sebaceous glands, leading to accumulation and subsequent infection of sebum. Clinically, swelling and pain are localized, and the discharged pus typically has a curd-like consistency. During surgical drainage, thorough removal of the entire cyst wall is essential to prevent recurrence.

5. Inflamed External Hemorrhoids

This condition is relatively common and typically results from delayed treatment of external hemorrhoids combined with inadequate rest. Friction and irritation at the affected site can precipitate secondary infection, causing pain and purulent discharge.

6. Postoperative Infection Following Anorectal Surgery

Postoperative infection is more frequently observed after complex anorectal procedures, particularly when wound surfaces are extensive. Poor patient compliance, frequent bowel movements, and inadequate wound care may contribute to worsening pain and systemic symptoms such as fever. Close clinical monitoring is therefore essential during the early postoperative period, and adjunctive use of heat-clearing and detoxifying traditional Chinese herbal medicines may help prevent infection.

The above outlines the major causes of anorectal pain. We hope this information proves helpful.