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Anal Fissure
Mild
An anal fissure is a small tear in the lining of the anus. It commonly causes sharp or burning pain during and after bowel movements and may produce a small amount of bright red blood on toilet paper or the surface of the stool. Anal fissures often develop when hard or large stools stretch the anal canal, although frequent diarrhea, childbirth, inflammatory bowel disease, or other conditions can also contribute. Most acute fissures improve with measures that keep stools soft and reduce strain during bowel movements.
Body System
Digestive System
When to Seek Medical Attention
Anal fissures usually improve with appropriate care and are not emergencies. Seek medical assessment for persistent or severe pain, recurrent bleeding, a fissure that does not heal, or symptoms that are worsening. Significant bleeding, fainting, or severe unexplained rectal pain requires prompt evaluation.
Symptoms
2
Causes
1
Treatments
5
Diet
4
Overview
An anal fissure is a small tear in the lining of the anus. It commonly causes sharp or burning pain during and after bowel movements and may produce a small amount of bright red blood on toilet paper or the surface of the stool. Anal fissures often develop when hard or large stools stretch the anal canal, although frequent diarrhea, childbirth, inflammatory bowel disease, or other conditions can also contribute. Most acute fissures improve with measures that keep stools soft and reduce strain during bowel movements.
Symptoms 2
Jaundice
Painful Urination
Causes 1
Anal fissures most commonly result from trauma to the anal canal when passing hard, dry, or unusually large stools. Repeated straining can increase the likelihood of a tear and may prevent it from healing. Frequent loose stools or prolonged diarrhea can also irritate the anal lining. Less commonly, fissures may be associated with inflammatory bowel disease, infections, previous anal surgery, childbirth, or other medical conditions. When a fissure is persistent, recurrent, or located in an unusual position, the clinician may investigate for an underlying condition.
Sedentary Lifestyle
Risk Factors
Risk factors for anal fissure include chronic constipation, passing hard stools, repeated straining, and frequent diarrhea. Pregnancy and childbirth can increase risk because of pressure and changes affecting the pelvic and anal region. Inflammatory bowel disease and some infections or other anorectal conditions can also predispose to fissures. Previous anal procedures may occasionally contribute. A low-fiber diet can make stools harder and increase the likelihood of trauma, particularly when combined with inadequate fluid intake.
Diagnosis
Diagnosis is based on a patient's medical history,
symptoms, physical examination and, when necessary,
laboratory or imaging investigations.
Anal fissure is usually diagnosed through the history of pain and bleeding together with examination of the anal area. A typical fissure may be visible as a small linear tear, often near the front or back of the anal opening. Examination can be uncomfortable, particularly during an acute episode, so it may be limited when pain is severe. Additional testing is generally unnecessary for a straightforward fissure. Persistent, recurrent, atypical, or multiple fissures may require further evaluation to identify inflammatory bowel disease, infection, or another underlying condition.
Prevention
Key Prevention Tips
Keeping stools soft and easy to pass is central to preventing anal fissures
Adequate dietary fiber and fluid intake can help maintain regular bowel movements, while avoiding unnecessary straining may reduce trauma to the anal canal
People prone to constipation may benefit from medical advice about appropriate stool-softening measures
Treating persistent diarrhea or underlying bowel disease can also reduce irritation
Good toilet habits and prompt attention to recurrent anal pain or bleeding may help prevent a short-term fissure from becoming persistent
Prevention Guidance
Keeping stools soft and easy to pass is central to preventing anal fissures. Adequate dietary fiber and fluid intake can help maintain regular bowel movements, while avoiding unnecessary straining may reduce trauma to the anal canal. People prone to constipation may benefit from medical advice about appropriate stool-softening measures. Treating persistent diarrhea or underlying bowel disease can also reduce irritation. Good toilet habits and prompt attention to recurrent anal pain or bleeding may help prevent a short-term fissure from becoming persistent.
Reminder: Prevention recommendations should be tailored to your personal health status and risk factors.
Treatment & Management 5
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Medical Note: The treatment information provided is intended for educational purposes only.
Always consult a qualified healthcare professional before starting,
stopping, or changing any treatment.
Diet & Nutrition 4
Recommended Foods
High Fiber Diet
Helps prevent hard stools.
Fresh Fruits
Improve bowel regularity.
Vegetables
Provide fiber and nutrients.
Adequate Water
Keeps stools soft.
Foods to Avoid
Low Fiber Foods
May worsen constipation.
Processed Foods
Often worsen bowel habits.
Medical Nutrition Note: Diet recommendations are intended for general educational purposes and should be tailored to individual health needs by a qualified healthcare professional.
Frequently Asked Questions 5
It is a small tear in the lining of the anus.
Hard stools and constipation are common causes.
Pain and bleeding during bowel movements are common.
Dietary changes, medicines, and sometimes surgery are used.
Many fissures heal with conservative treatment.
Helpful Tip: These answers provide general medical information.
Consult your healthcare provider for advice tailored to your condition.