What Causes Anal Distension and Pain?

I have a friend from northern China who is especially fond of Sichuan hotpot. When he visited me, he ate hotpot every day for a full week. Over the past two days, he has developed a sensation of anal fullness and pain. So, what causes anal fullness and pain?

What Causes Anal Fullness and Pain?

Anal fullness and pain may result from conditions such as a submucosal abscess of the rectum or an abscess in the perianal or perirectal spaces. Additionally, proctitis (inflammation of the rectum) and anal sinusitis can also lead to anal distension and pain. Diagnosis typically requires digital rectal examination and anoscopy; in some cases, electronic fiberoptic colonoscopy may be necessary. During colonoscopy—particularly with retroflexion—the anal canal and rectum can be directly visualized. Other diagnostic modalities include transrectal ultrasound or pelvic MRI. Once the diagnosis is confirmed, prompt symptomatic treatment should be initiated. If the condition is caused by an infectious process—such as a submucosal rectal abscess—surgical intervention is usually required. Postoperatively, patients should rest adequately, change dressings regularly, and take measures to promote wound healing.

To prevent anorectal diseases, maintain local perianal hygiene, develop healthy bowel habits, adjust your diet appropriately, reduce intake of spicy and irritating foods, and limit consumption of fried foods. Anorectal disorders are relatively common in clinical practice and are often triggered by multiple external adverse factors. Their onset is frequently associated with chronic constipation, recurrent diarrhea, and diets rich in spicy or irritating foods.

If you experience symptoms suggestive of anorectal disease, seek evaluation at a reputable medical institution as soon as possible to ensure early diagnosis and treatment. After treatment, it is essential to frequently change undergarments to minimize exposure to external irritants. We hope this information proves helpful to you.