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Chronic vs Acute Anal Fissure Treatment: What’s Different?

Picture of <strong>Dr QM Leong</strong>
Dr QM Leong

Colorectal & Hernia Surgeon
21+ years of experience

Last medically reviewed: 

February 25, 2026
Abdominal and rectal pain commonly associated with chronic anal fissure requiring treatment in Singapore.

Summary: 

  • Anal fissures are tiny tears in the lining of your anal canal that can cause sharp pain, bleeding, and discomfort during bowel movements. Some fissures heal quickly on their own, while others linger and become chronic, making everyday activities painful.
  • Acute fissures usually improve within a few weeks with simple care like stool softening, hydration, and topical creams.
  • Chronic fissures, however, persist due to repeated sphincter spasms, scar tissue, and reduced blood flow, often requiring more focused interventions to fully heal.

If you’ve experienced a sharp, burning pain when passing stool, you could be dealing with an anal fissure. These tiny tears in the lining of your anal canal may seem minor, but they can cause a surprising amount of discomfort.

The tricky part is that not all fissures behave the same way; some heal on their own within a few weeks, while others linger, turning chronic and requiring more focused care to fully heal.

Keep reading to learn how acute and chronic anal fissures differ so you can get the right treatment and avoid unnecessary discomfort, especially when understanding what causes anal fissures and how they are typically managed in Singapore.

Anal fissures are tiny tears in the skin or mucous lining of your anal canal. While they may look small, they can cause significant pain and even bleeding.

Think of them like paper cuts, but in a highly sensitive area. A small tear may heal on its own, but ongoing strain can prevent it from closing and turn it into a chronic issue.

These tears often occur when the tissue around your anus is stretched too far, which is closely linked to how anal fissures develop and are commonly treated in Singapore. Even the simplest bowel movement can become excruciating if you already have a fissure. The pain may be sharp, burning, or even make you feel tense between bowel movements, especially if the fissure persists.

Common Causes and Triggers

Anal fissures can happen to anyone, but some triggers make them more likely:

  • Constipation or hard stools: Straining puts pressure on the anal lining.
  • Chronic diarrhoea: Frequent irritation can wear down tissue.
  • Straining during bowel movements: Even short-term stress can tear delicate tissue.
  • Childbirth or anal trauma: Physical stress can lead to tears.
  • Underlying conditions: Inflammatory bowel disease or infections may contribute.

While these are common triggers, lifestyle factors like hydration, diet, and bowel habits also play a role in how easily fissures develop or persist.

Symptoms to Watch For

Knowing the signs can help you catch a fissure early:

  • Sharp, burning pain during or after bowel movements
  • Bright red blood on the toilet paper or stool
  • Itching, irritation, or discomfort around the anus
  • Small lumps or skin tags in chronic cases
  • Spasms in the anal sphincter

In some cases, these symptoms may overlap with other conditions, which is why understanding how anal fissures are identified and managed in Singapore becomes important.

How Do Acute and Chronic Fissures Differ?

Anal fissures generally fall into two types—acute and chronic—which differ in healing patterns and severity, as well as how chronic anal fissures develop and require different treatment approaches.

Symptoms to Watch For

Acute fissures typically appear suddenly after hard stools or straining. Pain is sharp and immediate during bowel movements, sometimes lasting a few minutes afterwards. Bleeding is usually minor, and discomfort often improves within a few days with simple care.

Chronic fissures, however, are more persistent. Pain can linger between bowel movements, bleeding may continue or recur, and you might notice a small lump or skin tag near the tear. Chronic fissures can also cause ongoing sphincter spasms, making bowel movements even more uncomfortable.

Healing Timelines

Healing timelines differ depending on the type of fissure:

  • Acute fissures: Often heal within four to six weeks if you stay hydrated, use simple topical care and the stools soften.
  • Chronic fissures: Can last beyond six to eight weeks, sometimes months, and rarely heal without medical intervention.

If your fissure hasn’t improved in a few weeks despite self-care, it’s time to consider professional treatment, especially when exploring non-surgical and medical options for managing anal fissures in Singapore. Delaying care can make healing slower and more complicated.

When a Fissure Becomes Chronic

A fissure is considered chronic when repeated trauma, sphincter spasms, or poor blood supply prevent it from healing naturally. Scar tissue may form around the tear, making it harder to treat with home remedies.

At this stage, your doctor may recommend more specialised approaches, particularly in cases involving treatment approaches used for long-standing or recurrent anal fissures.

Experiencing anal pain and unsure if it’s a fissure? Contact us so we can assess your condition, guide you on the right approach, and help you find relief quickly.

Why Can’t All Fissures Be Treated the Same Way?

It’s easy to assume that what works for one fissure will work for all. In reality, chronic anal fissures act differently from acute ones, and using the same treatment for both can keep you in pain longer than necessary.

Limits of Topical Medication

For acute fissures, you can often rely on topical creams or ointments that relax the sphincter or boost blood flow. They relieve pain, promote healing of the tear, and typically show results within a few weeks.

Chronic fissures, however, don’t respond as easily. Scar tissue, ongoing muscle spasms, and poor blood flow keep the tear open, so simple creams alone usually won’t be enough.

This is often due to underlying factors, which explains why chronic anal fissures may require more advanced treatment options.

When Procedures May Be Needed

When medication and lifestyle changes aren’t enough, particularly in cases involving when surgery may be recommended for persistent anal fissures, your doctor may suggest minimally invasive treatments such as:

  • Lateral internal sphincterotomy: This involves making a small incision in the anal sphincter to relieve pressure. This helps blood flow improve and allows the fissure to heal faster.
  • Anal advancement flap (or mucosal flap): In more stubborn cases where the fissure hasn’t healed despite other procedures, a small piece of healthy tissue may be used to cover the fissure. This encourages healing while protecting the area from further trauma.

What Happens If Diagnosis Is Delayed?

Ignoring a chronic anal fissure or delaying a consultation can complicate treatment, particularly when considering how chronic anal fissures develop and worsen without proper care.

Persistent Sphincter Spasms

If your anal sphincter keeps tightening, it prevents the fissure from closing on its own. The repeated spasms from this make each bowel movement more painful and slow down your body’s natural healing process.

Reduced Blood Flow

A chronic tear can also affect circulation in the area. Scar tissue and ongoing irritation reduce blood flow, which means your tissue isn’t getting the nutrients it needs to repair itself. Without good circulation, healing becomes much slower and more frustrating.

More Complex Treatment

The longer you wait, the harder the fissure becomes to treat. Simple creams or home remedies may no longer be enough. You might need injections, minor procedures, or even a small surgical intervention to finally close the fissure and relieve the pain.

Speak to a Colorectal Specialist in Singapore

If you have anal pain that lasts more than a few weeks, or worsens despite simple care, it may indicate the need for a complete overview of anal fissure diagnosis and treatment options in Singapore.

At Advanced Colorectal and General Surgery in Singapore, our experienced colorectal surgeon, Dr QM Leong can access whether your fissure is acute or chronic and recommend a combination of lifestyle changes, medication and procedures to prevent further complications and speed up recovery.

Contact us today.

Disclaimer

This article is intended for general educational purposes only and does not replace professional medical advice. If you are experiencing symptoms or have concerns about your health, please consult a qualified doctor for an assessment tailored to your situation.