Pain during a bowel movement almost always comes from a problem in the last inch or two of the digestive tract, the anus or lower rectum. The three most common causes are anal fissures (small tears in the lining), hemorrhoids, and perianal abscesses. Most of these are treatable at home or with minor medical care, but the type of pain you’re feeling can help you narrow down what’s going on.
Anal Fissures: The Most Common Cause
An anal fissure is a small tear in the thin tissue lining the anus. It’s the single most likely reason for sharp pain during and after pooping. The pain happens because each bowel movement stretches the tear open again, which is why it often feels like passing broken glass. Bright red blood on the toilet paper, usually just streaks rather than heavy bleeding, is the other hallmark sign.
The pain doesn’t always stop when you’re done. Many people with fissures experience a burning or throbbing ache that lingers for minutes to hours afterward. A fissure that heals and reopens repeatedly can become chronic, developing thickened edges and a small skin tag near the tear. Constipation and hard stools are the most common triggers, but diarrhea, childbirth, and anal sex can also cause them.
Fissures are frequently misdiagnosed as hemorrhoids, even by people who’ve dealt with both. The key difference: fissure pain is sharp and directly tied to the moment of passing stool, while hemorrhoid pain tends to feel more like pressure or soreness.
Hemorrhoids That Actually Hurt
Hemorrhoids are swollen blood vessels in or around the anus. Internal hemorrhoids, the ones inside the rectum, usually don’t hurt at all. They bleed, and they sometimes bulge outward, but the tissue they sit in has very few pain-sensing nerves. External hemorrhoids are a different story. They form under the skin around the opening of the anus, where nerve endings are dense, so they can ache, itch, and burn.
The most painful version is a thrombosed hemorrhoid, one that develops a blood clot inside. It typically shows up as a firm, bluish-purple lump you can see or feel near the opening. This type causes intense, localized pain that gets worse when you sit, walk, or have a bowel movement. Thrombosed hemorrhoids usually peak in pain over the first 48 to 72 hours and then gradually improve on their own, though some need to be drained.
Abscesses and Infections
A perianal abscess is a pocket of pus caused by an infected gland near the anus. It creates a swollen, warm, tender lump that throbs constantly, not just during bowel movements. Fever and feeling generally unwell often accompany it. Unlike fissures and hemorrhoids, an abscess typically needs to be drained by a doctor and won’t resolve on its own. Left untreated, an abscess can develop into a fistula, an abnormal tunnel between the inside of the anus and the surrounding skin.
Sexually transmitted infections can also cause rectal pain. Gonorrhea, chlamydia, herpes, and syphilis can all inflame the rectum, a condition called proctitis. Symptoms include anorectal pain, a feeling of urgency or incomplete emptying, and sometimes discharge. Proctitis from STIs is most common in people who have receptive anal sex but can occasionally result from spread of infection from nearby areas.
Muscle and Nerve Pain
Not all anal pain comes from a visible injury. Two functional pain conditions can cause rectal pain that seems to come out of nowhere.
Proctalgia fugax causes sudden, intense cramps in the anus or lower rectum that last anywhere from a few seconds to a few minutes and then disappear completely. There’s no pain between episodes. Stress and anxiety are common triggers, though many episodes have no clear cause.
Levator ani syndrome involves a dull ache or pressure in the rectum that lasts 20 minutes or longer per episode, sometimes hours. It’s often worse when sitting and better when standing or lying down. This condition comes from tension or spasm in the pelvic floor muscles and is diagnosed only after other causes like fissures, hemorrhoids, and abscesses have been ruled out.
What the Pain Feels Like Matters
The character and timing of your pain is the best clue to its cause:
- Sharp, cutting pain during and after wiping that lingers for minutes to hours points toward a fissure.
- Constant throbbing with a visible lump suggests a thrombosed hemorrhoid or abscess.
- Pressure or fullness inside the rectum could be an internal hemorrhoid that has swollen significantly or, rarely, a growth.
- Brief, intense cramps that vanish completely are characteristic of proctalgia fugax.
- Pain with discharge or urgency raises the possibility of infection or inflammation.
What Helps at Home
Most fissures and non-thrombosed hemorrhoids heal with basic self-care. The goal is to keep stools soft so they pass without straining or re-tearing damaged tissue. That means getting enough fiber: 25 grams a day for women 50 and younger, 38 grams for men 50 and younger, and slightly less for adults over 50. If your current diet is low in fiber, increase gradually over a week or two to avoid bloating. Drinking plenty of water alongside that fiber is what actually makes stools softer.
A sitz bath, sitting in a few inches of warm water, is one of the most effective ways to ease anal pain. Keep the water around 104°F (40°C) and soak for 15 to 20 minutes. You can do this in a regular bathtub or with an inexpensive basin that fits over your toilet seat. Two to three times a day, especially after bowel movements, helps relax the sphincter muscles and improve blood flow to the area. Over-the-counter creams containing a numbing agent or a low-dose anti-inflammatory can help with surface-level pain and itching.
Avoid straining. If you’re sitting on the toilet for more than a few minutes without results, get up and try again later. Prolonged straining increases pressure on hemorrhoids and pulls fissures apart.
Signs That Need Medical Attention
Most anal pain is caused by something benign, but certain patterns warrant a visit to your doctor. Rectal bleeding that persists beyond a week or two, bleeding that’s dark rather than bright red, pain that gets progressively worse instead of better, unexplained weight loss, and a change in your usual bowel habits (new diarrhea or narrowing of stools) are all worth getting checked. A study in the Journal of the National Cancer Institute found that rectal bleeding was the single strongest early warning sign for colorectal cancer in younger adults, with roughly five times the risk compared to people without bleeding. That doesn’t mean rectal bleeding is likely to be cancer. It means persistent or unexplained bleeding deserves an evaluation rather than assumptions.
A fever alongside anal pain suggests an abscess or infection that needs treatment. A lump that’s growing, extremely painful, or hasn’t improved after a few days should also be examined. If you’re over 45, or have a family history of colorectal cancer, any new rectal symptoms are a reasonable prompt to schedule an appointment.
What Happens at a Doctor’s Visit
An evaluation for anal pain is brief and straightforward. You’ll lie on your side with your knees bent or lean forward over the exam table. The provider will visually inspect the area first, which alone can identify external hemorrhoids, thrombosed hemorrhoids, fissures, and abscesses. A digital rectal exam, a gloved, lubricated finger inserted gently into the anus, lets them check for internal swelling or tenderness. If needed, they may use an anoscope, a small lighted tube inserted about two inches, to see the lining of the lower rectum. The entire process takes just a few minutes. If you’re experiencing significant pain, a numbing agent can be applied beforehand.