Sharp pain during stool
A cutting, tearing or glass-like pain while passing stool is the most typical fissure symptom.
Fissure Info
Fissure Causes & Symptoms: Anal Pain, Bleeding and Burning
An anal fissure is a small tear in the anal canal. It commonly causes sharp pain during stool, burning afterward and fresh red bleeding. The usual triggers are hard stool, constipation, straining, diarrhoea or local trauma.
Common trigger
Hard stool + straining
Typical symptom
Sharp pain during stool
Do not ignore
Any rectal bleeding
Main Symptoms
What are the symptoms of anal fissure?
Fissure symptoms are often intense because the tear sits in a sensitive area. Pain, bleeding and spasm can create a cycle where fear of stool leads to constipation, and constipation reopens the tear.
Important: Fissure, piles, fistula and other bowel conditions can overlap. A doctor should evaluate rectal bleeding or recurrent anal pain before treatment.
Burning after bowel movement
Pain or burning can continue for minutes to hours because the anal sphincter goes into spasm.
Fresh red bleeding
Small streaks of bright red blood may appear on toilet paper or on the surface of stool.
Anal spasm or tightness
The internal sphincter may tighten after stool, reducing blood flow and slowing healing.
Fear of passing stool
Patients may delay bowel movements because of pain, which can worsen constipation and repeat tearing.
Skin tag in chronic fissure
A long-standing fissure may form a small sentinel skin tag near the tear.
Root Causes
What causes an anal fissure?
Most fissures begin with local trauma to the anal lining. Treating the trigger is as important as treating the tear, because recurrence is common when stool remains hard.
Constipation and hard stool
Large, dry or hard stool can stretch and tear the delicate lining of the anal canal.
Straining during bowel movement
Repeated pushing increases pressure and can reopen a fissure that had started healing.
Chronic diarrhoea
Frequent loose stools and wiping can irritate the anal skin and trigger a tear.
Low fibre and low fluid intake
Poor fibre and inadequate water intake make stool harder, increasing the risk of fissure.
Childbirth or local trauma
Stretching during delivery or local injury can cause a fissure in some patients.
Inflammatory bowel disease
Crohn's disease and other inflammatory conditions can cause atypical or recurrent fissures.
Fissure vs piles vs fistula: why diagnosis matters
Many patients call every anal symptom piles, but fissure treatment is different. The first step is a clear diagnosis based on symptoms and examination.
View Fissure TreatmentConditionPainBleedingClue
Anal fissure
Sharp cutting pain during stool, burning afterward
Usually small fresh red streaks
Pain is often the dominant symptom
Piles
Itching, swelling, prolapse or discomfort; internal piles may be painless
Fresh red bleeding can occur
May feel like a lump or tissue coming out
Fistula or abscess
Throbbing pain, swelling or recurrent discharge
Bleeding is not usually the main symptom
Pus, fever or repeated boils need urgent review
Warning Signs
When fissure symptoms need medical evaluation
Mild fissures may improve with correct bowel care, but persistent pain, bleeding or infection signs should not be managed with home remedies alone.
Heavy bleeding, repeated bleeding or blood mixed throughout stool
Black stool, unexplained weight loss, weakness or anaemia symptoms
Fever, swelling, pus discharge or rapidly worsening anal pain
A fissure that is not improving after a few weeks of correct care
Severe constipation with inability to pass stool or gas
New rectal bleeding after age 40 or a recent change in bowel habit
Prevention
How to reduce fissure triggers at home
These measures reduce friction and straining. They are not a substitute for examination when bleeding, severe pain or recurrent symptoms are present.
1
Keep stool soft with fibre-rich meals, fruits, vegetables, pulses and whole grains.
2
Drink enough water unless your doctor has advised fluid restriction.
3
Avoid straining; leave the toilet and try again later if stool does not pass easily.
4
Do not sit on the toilet for long periods or scroll on the phone there.
5
Use warm sitz baths if advised to reduce spasm and discomfort.
6
Get examined if pain, bleeding or constipation keeps returning.
Diagnosis
How doctors confirm fissure causes and symptoms
Fissure is often diagnosed clinically, but the doctor also checks for causes that need different care, such as infection, inflammatory bowel disease, piles or fistula.
1
Symptom history
The doctor asks about pain timing, bleeding, constipation, diarrhoea, pregnancy, medicines and duration.
2
Gentle local examination
Most fissures can be identified by careful inspection. Painful cases are examined cautiously.
3
Rule out similar conditions
Piles, abscess, fistula, infection, Crohn's disease and other causes of bleeding may need consideration.
4
Treatment plan
Care focuses on soft stool, reducing sphincter spasm, healing the tear and preventing recurrence.
Anal Fissure Treatment
Explore medicines, Botox, laser fissurectomy and surgery options when fissure does not heal.
Read moreAcute vs Chronic Fissure
Know how symptom duration, spasm and skin tags change the treatment plan.
Read moreWhen to See a Doctor
Learn which pain, bleeding and bowel changes need prompt specialist evaluation.
Read moreFAQ
Fissure Causes and Symptoms: Common Questions
What is the most common symptom of an anal fissure?
The most common symptom is sharp, cutting pain during bowel movement, often followed by burning or spasm that can last after stool.
Can fissure cause bright red bleeding?
Yes. An anal fissure can cause small amounts of fresh red blood on toilet paper or on the surface of stool. Any rectal bleeding should be evaluated to confirm the cause.
What causes fissure to happen again?
Recurring constipation, hard stool, straining, long toilet sitting, diarrhoea and untreated sphincter spasm can reopen a fissure or delay healing.
How do I know if it is fissure or piles?
Fissure usually causes sharp pain during stool, while piles more often cause bleeding, itching, swelling or prolapse. Symptoms overlap, so examination is the safest way to know.
When does a fissure become chronic?
A fissure is often considered chronic when symptoms continue for several weeks or the tear shows long-standing changes such as a sentinel skin tag or persistent spasm.
When should I see a doctor for fissure symptoms?
See a doctor for rectal bleeding, severe or recurrent pain, fever, pus discharge, a non-healing fissure, black stool, unexplained weight loss or a change in bowel habit.
RectoRelief Hospital
Get fissure pain and bleeding checked early
Our anorectal team evaluates pain timing, bleeding, constipation, sphincter spasm and recurrence before recommending a treatment plan.
Medical references used for this guide
Content reviewed against patient education from Mayo Clinic, Cleveland Clinic, Johns Hopkins Medicine, and NIDDK constipation guidance. This page is educational and does not replace a clinician's examination.