Do you see pus coming from the anus or from a spot near it? Many people feel scared and shy about this. So they wait for weeks. Please do not wait. A small hole near the anus that keeps leaking is often an anal fistula. The good news is that it can be treated. At Kaizen Fistula Care, Dr. Samrat Jankar, an experienced colorectal surgeon with 17+ years of practice, has done over 5,000 fistula surgeries. In this blog, he explains the signs, causes, tests and treatment in simple words.
Why Is Pus Coming Out Near My Anus?
Pus means there is an infection. Germs collect in a small gland inside the anus. The gland gets blocked. A pocket of pus forms. This is called a perianal abscess. When it bursts, pus comes out through the skin. If the pus keeps coming, a small tunnel may form. This tunnel is a fistula.
Could Pus Discharge Near the Anus Be a Sign of Anal Fistula?
Yes, it can be. Pus discharge near the anus that comes again and again is a common sign. It is more likely if you had a painful boil or abscess near the anus before. But not every discharge is a fistula. Piles and skin infections can look similar. Only a colorectal surgeon can tell you for sure.
What Is an Anal Fistula and How Does It Develop?
An anal fistula is a small tunnel. It joins the inside of the anus to the skin outside. Doctors also call it a perianal fistula. It usually starts after an anal abscess. The abscess drains, but the tunnel stays open. Stool and germs keep going inside. So the infection comes back again and again.
Common Causes of a Small Opening Near the Anus:
A small opening near the anus usually forms after an infection. It is most often a sign of an anal fistula. Here are the common causes:
- Infected anal gland: Germs block a small gland inside the anus. Pus collects and finds a way out through the skin. This is the most common cause.
- Perianal abscess: A painful boil near the anus bursts or is drained. A tunnel stays behind, and pus keeps coming out of it.
- Crohn’s disease: This bowel disease causes swelling and ulcers. It can lead to repeat fistulas.
- Tuberculosis (TB): TB of the intestine or anal area can cause a long-lasting hole with discharge.
- Injury or old surgery: A wound, a tear after childbirth or earlier anal surgery can sometimes cause it.
- Diabetes or low immunity: The body cannot fight infection well, so the problem keeps coming back.
- Long-term constipation or loose motions: Straining and irritation can infect the anal glands.
- Rare causes: Cancer or radiation treatment.
Sometimes, no clear cause is found. This is not your fault.
Any small hole near the anus that leaks pus should be checked by a colorectal surgeon.
How to Identify the Symptoms of an Anal Fistula?
These are the common fistula-in-ano symptoms:
- A small hole near the anus on the skin
- Pus, blood or fluid coming out of it
- Itching and skin irritation
- Swelling or a painful lump near the anus
- Pain while sitting or passing stool
- Fever when the infection flares up
Anal fistula discharge colour is usually yellow, white or brown. Sometimes there is blood too. A small hole near the anus leaking fluid is a warning sign. Some people have pus without pain near the anus. Even then, please get it checked.
Anal Fistula vs Perianal Abscess: What Is the Difference?
Here is the difference between perianal abscess and fistula. An abscess is a sudden pocket of pus. It causes severe pain, swelling and fever. A fistula is the long-term tunnel that may follow. It gives less pain but constant discharge. So, the abscess is the early stage. The fistula is the later stage.
The table below shows the main differences at a glance:
If you have pus discharge near the anus, please get it checked early.
Why Does Pus Keep Coming From the Same Opening?
The tunnel stays connected to the anus. Germs and stool keep entering it. The body cannot clear the infection. So you get continuous pus drainage from the perianal wound. The hole may close for a few days and then open again. This is recurrent pus near the anus. Many patients ask, “Why does my fistula discharge smell bad?” The reason is germs and small traces of stool inside the tunnel.
When Should You See a Doctor for Pus Near the Anus?
Pus near the anus is never normal. Please do not wait for it to go away on its own. Early check-up means simpler treatment and faster recovery.
See a doctor if:
- Pus or discharge lasts more than a week
- A small hole near the anus keeps leaking or keeps coming back
- You have a painful or growing lump near the anus
- You had an abscess earlier and see pus again
See a doctor immediately if you have:
- High fever or chills
- Severe pain or fast-increasing swelling
If you have diabetes, Crohn’s disease or low immunity, do not delay. Infection can spread faster in these cases. A colorectal surgeon can examine you and tell if it is a fistula. Creams and home remedies cannot cure it.
How Is an Anal Fistula Diagnosed?
Diagnosis is usually simple. The doctor first asks about your symptoms and past history, such as an earlier abscess, diabetes or Crohn’s disease. Then he gently examines the area around the anus. He checks the small hole, the skin and the path of the tunnel.
The main aim is to find the inner opening inside the anus. The doctor also checks how close the tunnel is to the anal muscles. This helps him plan a safe treatment that protects your bowel control.
Not every hole near the anus is a fistula. So, a proper check-up by a colorectal surgeon is important.
What Tests May Be Recommended for an Anal Fistula?
Simple fistulas may not need any test. Complex or repeat cases need scans. Common tests are:
- MRI fistulogram, the best scan to map the tunnel
- Ultrasound of the anal canal
- Colonoscopy, if bowel disease is suspected
- Routine blood tests
Treatment Options for Anal Fistula:
No medicine or cream can close a fistula. The tunnel is lined with tissue, so it does not heal on its own. It needs surgery. The right surgery depends on where the tunnel is, how deep it goes and how much muscle it crosses. Your general health also matters.
- Fistulotomy: The surgeon opens the tunnel and lets it heal from inside out. It works very well for simple fistulas. It is not used when the tunnel crosses a large part of the anal muscle, as this can affect bowel control.
- Seton treatment: A soft thread is placed in the tunnel. It keeps the tunnel open so pus can drain. It also protects the muscle. A seton is often used in deep or complex fistulas. Sometimes it is kept as the first step before the final surgery.
- LIFT procedure: LIFT means Ligation of the Intersphincteric Fistula Tract. The surgeon closes the tunnel in the space between the two anal muscles. The muscles are not cut. So, bowel control stays safe.
- Laser treatment: A thin laser fibre is passed inside the tunnel. It closes the tunnel from within. There is very little cutting. Wounds are small, and many patients have less pain after surgery.
- Rectal advancement flap: The inner opening is covered with a flap of healthy tissue from the rectum. This is useful in deep or complex fistulas. The muscle is not cut.
- Other options: Fibrin glue, fistula plug and VAAFT (video-assisted treatment) are also used in selected cases. They involve less cutting. But the success rate may vary from case to case.
- PILTEC technique: PILTEC is a method developed by Dr. Samrat Jankar for complex and recurrent fistulas. It is meant for cases where earlier surgeries did not work. The aim is to close the tunnel fully while protecting the anal muscles.
Which treatment is best?
There is no single best surgery for everyone. The surgeon first finds the inner opening and checks the path of the tunnel. Then he chooses the safest method. A good choice lowers the chance of the fistula coming back and protects your bowel control.
Can an Anal Fistula Heal on Its Own?
Very rarely. The tunnel has its own lining. So germs keep entering it. The hole may look closed for some time. But the infection stays inside. Then the pus comes back. If you wait too long, new tunnels may form. Then the surgery becomes harder. So it is better to treat it early.
How to Take Care of the Area Until You See a Doctor?
Many people ask how to stop pus coming from a fistula at home. Home care cannot cure it. But it can give you some relief until treatment:
- Sit in a tub of warm water for 10–15 minutes, two to three times a day
- Clean the area gently and pat it dry
- Use a clean pad or gauze for the discharge from the fistula
- Wear loose cotton underwear
- Eat fibre-rich food and drink plenty of water
- Do not strain on the toilet
- Never squeeze, pierce or cut the hole yourself
Please see a doctor soon, even if the discharge reduces.
Frequently Asked Questions About Pus Discharge and Anal Fistula:
Yes, it often is. Pus that comes again and again from a small opening is a common sign of an anal fistula. This is more likely if you had a painful boil or abscess near the anus earlier. Other problems can look similar, so a specialist should confirm it.
It usually means there is an infected tunnel between the anus and the skin. The pus drains out through this small hole. Sometimes it can also be a draining abscess. A proper check-up will tell you which one it is.
No, a true fistula does not heal fully without surgery. The hole may close for a few days, but the infection stays inside. Then the pus comes back. Medicines and home care can only give temporary relief.
An abscess is a sudden, painful pocket of pus. It causes swelling and often fever. A fistula is the long-term tunnel that may form after the abscess drains. It gives less pain but keeps leaking pus.
Both are possible. Many people have only mild pain or no pain at all. Pain increases when the hole gets blocked and pus is trapped inside. Even a painless discharge needs a check-up.
The doctor asks about your symptoms and examines the area gently. He looks for the outer hole and the inner opening. In complex or repeat cases, an MRI or ultrasound is also done. This shows the exact path of the tunnel.
The options are fistulotomy, seton placement, the LIFT procedure, laser treatment and rectal advancement flap repair. The right one depends on the position of the tunnel and its closeness to the anal muscles. The surgeon chooses what is safest for you.
See a doctor if the discharge lasts more than a week or keeps coming back. Also go if you have a painful lump, fever or increasing swelling. Early treatment means simpler surgery and faster recovery.
Conclusion: When to Seek Medical Advice for Pus Near the Anus?
Pus near the anus is never normal. A small hole near the anus that keeps leaking is often an anal fistula. It does not go away on its own. Creams and home remedies can only give temporary relief.
Please do not feel shy or wait for weeks. Early treatment means simpler surgery, faster recovery and a lower chance of the problem coming back. Today, safe options like laser treatment, LIFT, seton and PILTEC are available. These protect your anal muscles and bowel control.
Don’t ignore the symptoms—book your appointment today to get your condition assessed and discuss the most suitable treatment for you. Early consultation can help you understand your options and take the next step towards recovery.
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