Pain During Bowel Movements? Could It Be an Anal Fissure?

Medically reviewed guide by Dr. S. Kalavathi, General, Laparoscopic Surgeon & Proctologist, Narayana General & Surgical Hospital, Mancherial · Updated October 2026

For some people, going to the toilet becomes something to dread. The pain can be sharp enough to make you tense up beforehand, and it may keep burning or throbbing long after you've finished. Many people put up with it for weeks, assuming it is "just piles" or something that will pass by itself.

In many cases, this pattern — pain that is clearly linked to passing stool — points to an anal fissure. This guide explains what a fissure is, why it hurts so much, how to tell it from piles, and when it needs treatment.

What Is an Anal Fissure?

An anal fissure is a small tear or crack in the thin, sensitive lining of the anal canal. It usually happens when a hard or large stool stretches the lining beyond what it can handle. The anal canal has very sensitive nerve endings, which is why even a tiny tear causes pain out of proportion to its size.

Why It Hurts So Much — and Why It Keeps Hurting

The tear itself is only half the story. When the lining tears, the ring of muscle around the anus (the sphincter) goes into spasm and tightens. That spasm squeezes the blood vessels in the area, so the tear gets less blood and heals slowly. The tight muscle also pulls the edges of the tear apart and makes the next bowel movement more likely to reopen it.

Fear then makes it worse: many people avoid going to the toilet, stools become harder, and the cycle repeats.

Symptoms of an Anal Fissure

• Sharp, cutting, or burning pain during bowel movements — the hallmark symptom, which can be quite severe.
• Pain that lingers after the stool is passed: a burning, aching, or throbbing feeling that can last from minutes to several hours.
• A small amount of bright red blood: usually a streak on the stool or toilet paper, rather than heavy bleeding.
• Constipation that gets worse because you start holding back from the toilet.
• Itching or irritation around the anus, and sometimes a small skin tag or lump next to the tear in long-standing cases.

Fissure, Piles, or Something Else?

These conditions sit in the same place and are easily mixed up. This comparison shows the usual differences:

A fissure and piles can also exist together. Because the treatment for each differs, the only reliable way to know is to be examined.

What Causes an Anal Fissure?

• Constipation and hard stools: the most common cause, especially with a low-fiber diet and too little water.
• Straining: pushing hard to pass stool stretches the lining.
• Chronic diarrhea: frequent loose stools can irritate and tear the lining too.
• Childbirth: pushing during delivery, and constipation afterwards, can cause fissures in women.
• A tight anal sphincter: high muscle tone reduces blood flow and slows healing.
• Underlying conditions: inflammatory bowel disease and some infections are less common causes, especially when a fissure is unusual in position or will not heal.

Acute vs Chronic Fissure

Infographic: When to See a Doctor

Treatment: From Simple Steps to Surgery

• Soften the stool: More fiber (vegetables, fruit, whole grains, pulses), plenty of water, and a stool softener if advised. This is the foundation of every treatment.
• Warm sitz baths: Sitting in warm water for 10 to 15 minutes, especially after passing stool, relaxes the muscle and eases pain.
• Prescribed ointments: Creams that relax the sphincter and numb the area help the tear heal. These work best when used as your doctor directs.
• Botulinum toxin injection: For stubborn fissures, an injection can relax the muscle for a few months while the tear heals.
• Surgery for chronic fissures: When a fissure does not heal despite proper treatment, a small procedure to relax the tight muscle (lateral internal sphincterotomy) has a success rate above 90 percent, and minimally invasive or laser options may be used where suitable. Your surgeon will also explain the small risk of minor bowel-control problems before you decide.
• Treat the cause: Correcting constipation, or investigating an underlying bowel condition, helps prevent the fissure from returning.

What to Avoid

• Holding it in: Avoiding the toilet makes stools harder and the fissure worse.
• Straining or sitting long on the toilet: Both put pressure on the tear.
• Random creams for weeks on end: Using over-the-counter creams without advice can delay the right diagnosis.
• Waiting it out indefinitely: A fissure that goes beyond a couple of months is unlikely to heal by itself.

Common Misconceptions

• "Pain with stool is always piles" — a fissure is a very common cause, and the two are treated differently.
• "A fissure always needs surgery" — most recent fissures heal with simple measures.
• "It will always heal on its own" — fissures that last beyond several weeks often do not.
• "Avoiding the toilet will give it time to heal" — it does the opposite by hardening the stool.
• "It's too embarrassing to mention" — surgeons treat fissures every day, and relief is often quick once treatment starts.

Frequently Asked Questions

This article is for general awareness and does not substitute professional medical advice, diagnosis, or treatment. Please consult a qualified surgeon to discuss your specific symptoms.