Anal Fissure: Symptoms, Causes and Treatment Options

Sharp pain during bowel movements, burning after passing stool or seeing a small amount of fresh blood on toilet paper can be worrying. Many patients assume these symptoms are caused by piles, but another common cause is an anal fissure.

One of the questions patients often ask me is, “Doctor, will an anal fissure heal on its own, or will I need surgery?”

The answer depends on how long the fissure has been present, whether constipation is continuing, how severe the pain is and whether the fissure has become chronic.

What Is an Anal Fissure?

An anal fissure is a small tear in the lining of the anal canal, usually near the anal opening.

The tear often develops after passing a hard or large stool. Because this area has many nerve endings, even a small fissure can cause significant pain.

When pain causes the anal sphincter muscle to tighten, blood flow to the area may reduce. This can make healing slower and create a cycle of pain, spasm and delayed healing.

What Are the Symptoms of an Anal Fissure?

The most typical symptom is sharp pain during or immediately after bowel movements. The pain may continue for several minutes or even longer after passing stool.

• Sharp or cutting pain during bowel movements
• Burning pain after passing stool
• Fresh red blood on toilet paper or stool
• Fear of passing stool because of pain
• Constipation or hard stools
• Itching or irritation around the anus
• A small skin tag near a chronic fissure

What Causes an Anal Fissure?

The most common cause is trauma to the anal lining from passing hard or large stools.

Constipation, repeated straining, dehydration and low-fibre diets can contribute. Some fissures may also occur after repeated diarrhoea, childbirth or other irritation of the anal canal.

Less commonly, fissures may be associated with inflammatory bowel disease or other medical conditions. Fissures that occur in an unusual location or repeatedly fail to heal should therefore be properly evaluated.

Is Anal Fissure the Same as Piles?

No. Anal fissure and piles are different conditions.

Piles are enlarged blood vessels in or around the anal canal. They commonly cause bleeding, swelling or prolapse.

An anal fissure is a tear in the anal lining and typically causes sharp pain during bowel movements.

Both conditions can cause fresh bleeding, which is why patients sometimes confuse them.

Internal link suggestion: Link “piles” to your Piles Laser Treatment page.

Is Anal Fissure the Same as Anal Fistula?

No.

A fissure is a superficial tear in the anal canal, while a fistula is an abnormal tunnel that usually develops after an anal abscess.

Fistulas commonly cause recurrent pus discharge or swelling, whereas fissures more commonly cause sharp pain during bowel movements.

Internal link suggestion: Link “anal fistula” to your Fistula Laser Treatment page.

What Is an Acute Anal Fissure?

An acute fissure is a relatively recent tear.

Many acute fissures can heal with proper bowel management, adequate fluid intake, stool-softening measures and local treatment prescribed by a doctor.

The earlier constipation and straining are corrected, the better the chance of healing without a procedure.

What Is a Chronic Anal Fissure?

A fissure that persists for several weeks or repeatedly returns may become chronic.

Chronic fissures may develop thickened edges, a small external skin tag and persistent sphincter muscle spasm.

At this stage, medication alone may not always be enough, and the patient may require further treatment.

How Is an Anal Fissure Diagnosed?

Diagnosis is usually made from the patient's symptoms and careful examination.

In many patients, the fissure can be seen near the anal opening. If the area is extremely painful, the examination is performed gently to avoid unnecessary discomfort.

Additional tests are not required for every straightforward fissure, but may be advised if symptoms are unusual, bleeding is persistent or another condition is suspected.

Can an Anal Fissure Heal Without Surgery?

Yes. Many recent anal fissures heal without surgery.

The first goal is to make bowel movements softer and easier so that the tear is not repeatedly injured.

This generally involves increasing dietary fibre, drinking adequate water, avoiding straining and using stool-softening medication when prescribed.

Warm sitz baths may also help relax the anal muscles and reduce discomfort.

What Medicines Are Used for Anal Fissure?

Doctors may prescribe local creams or ointments to reduce sphincter spasm and improve blood flow to the fissure.

Pain-relieving medication and stool softeners may also be used depending on the patient's symptoms.

These medicines should be used under medical guidance because some topical treatments can cause side effects such as headache or low blood pressure.

When Does an Anal Fissure Need a Procedure?

A procedure may be considered when a fissure becomes chronic, continues to cause severe pain despite appropriate medical treatment or repeatedly returns.

The choice of procedure depends on the patient's age, sphincter function, previous surgeries, childbirth history and overall risk of continence problems.

What Is Lateral Internal Sphincterotomy?

Lateral internal sphincterotomy is a well-established surgical treatment for selected chronic anal fissures.

During the procedure, a controlled portion of the internal anal sphincter muscle is divided. This reduces excessive muscle spasm and improves blood flow to the fissure, allowing it to heal.

Because the anal sphincter is involved in continence, proper patient selection and surgical technique are important.

Is Laser Treatment Available for Anal Fissure?

Laser-assisted techniques may be offered in some centres for selected patients with chronic fissure or associated tissue changes.

However, “laser” is not a single standard procedure for every anal fissure. The treatment must be chosen according to the actual cause of pain, degree of sphincter spasm and whether associated piles or other problems are present.

The goal should always be safe healing while protecting normal anal function.

Internal link suggestion: Link “fissure laser treatment” to your Fissure Laser Treatment page.

Can Anal Fissure Treatment Be Done as Day-Care Surgery?

Many procedures for chronic anal fissure can be performed as day-care procedures in appropriately selected patients.

The patient may return home after observation on the same day, depending on the procedure, anaesthesia and overall health condition.

Internal link suggestion: Link “day-care surgery” to your Day Care General Surgery page.

How Long Does an Anal Fissure Take to Heal?

Healing time varies from patient to patient.

A recent fissure may improve within a few weeks when constipation is corrected and proper treatment is followed. Chronic fissures may take longer or may require a procedure before complete healing occurs.

Even after pain improves, maintaining soft bowel movements is important because another hard stool can reopen the fissure.

Why Does an Anal Fissure Keep Coming Back?

Recurrence is commonly related to persistent constipation, repeated straining, hard stools or incomplete healing.

Some patients stop stool-softening measures as soon as the pain decreases. If constipation returns, the fissure may reopen.

This is why long-term bowel habits are an important part of treatment, not just pain relief.

What Should You Eat If You Have an Anal Fissure?

A fibre-rich diet can help make stool softer and easier to pass.

Vegetables, fruits, whole grains, pulses and adequate water intake are commonly recommended. The amount of fibre should be increased gradually if your diet has previously been low in fibre.

Patients should also avoid repeatedly delaying bowel movements because stool can become harder the longer it remains in the bowel.

When Should You See a Doctor?

Seek medical evaluation if pain during bowel movements persists, bleeding continues, symptoms repeatedly return or you are unable to pass stool comfortably.

You should also be evaluated if bleeding is heavy, associated with unexplained weight loss, changes in bowel habits or other concerning symptoms, because not every episode of rectal bleeding is caused by fissure or piles.

Doctor's Advice

When patients come to me with an anal fissure, many have already developed fear of passing stool because they expect severe pain.

That fear can lead to delaying bowel movements, which makes the stool harder and worsens the fissure.

I usually explain that breaking the cycle of hard stool, pain and muscle spasm is one of the most important parts of treatment.

Early fissures often improve with proper bowel management and medication. Chronic fissures may require a procedure, but the treatment should always be chosen according to the individual patient rather than simply selecting the most advertised technique.

Frequently Asked Questions

Can constipation cause an anal fissure?

Yes. Hard stool and repeated straining are among the most common causes of anal fissure.

Can an anal fissure cause bleeding?

Yes. A small amount of fresh red blood may appear on toilet paper or on the surface of the stool.

Does every fissure need surgery?

No. Many acute fissures heal with stool-softening measures, local medication and lifestyle changes.

Can a chronic fissure heal with medicines?

Some chronic fissures improve with medication, but persistent fissures may require a procedure when conservative treatment fails.

Is laser treatment suitable for every fissure?

No. The correct treatment depends on the duration of the fissure, sphincter spasm, associated conditions and individual patient factors.

Can a fissure return after treatment?

Yes. Recurrence can occur, particularly if constipation, hard stools or repeated straining continue.

Conclusion

An anal fissure is a small tear in the anal canal that commonly causes sharp pain and fresh bleeding during bowel movements.

Constipation and hard stools are among the most frequent causes.

Many early fissures can heal with proper bowel management, medication and lifestyle changes, while chronic fissures may require a procedure.

The most important step is to treat both the fissure and the bowel habits that caused it.

If pain or bleeding continues despite home measures, a proper surgical evaluation can confirm the diagnosis and help determine the most appropriate treatment.