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An anal fistula is a small tunnel that connects an infected gland inside the anus to an opening on the skin around the anus. Symptoms include pain and swelling around the anus. Diagnosis and treatment are discussed.
An anal fistula is a small tunnel that connects an abscess, an infected cavity in the anus, to an opening in the skin around the anus.
The anus is the external opening through which faeces are expelled from the body. Just inside the anus are several small glands that make mucus. Occasionally, these glands get clogged and can become infected, leading to an abscess. About half of these abscesses may develop into a fistula.
The leading causes of an anal fistula are clogged anal glands and anal abscesses. Other, much less common, conditions that can cause an anal fistula include:
The signs and symptoms of an anal fistula include:
You should see your doctor if you notice any of these symptoms.
Your doctor can usually diagnose an anal fistula by examining the area around the anus. He or she will look for an opening (the fistula tract) on the skin. The doctor will then try to determine how deep the tract is, and the direction in which it is going. In many cases, there will be drainage from the external opening.
Some fistulas may not be visible on the skin's surface. In this case, your physician may need to perform additional tests:
If a fistula is found, your physician may also want to do further tests to see if the condition is related to Crohn's disease, an inflammatory disease of the intestine. About 25% of people with Crohn's disease develop fistulas. Among these studies are blood tests, X-rays and colonoscopy. A colonoscopy is a procedure in which a flexible, lighted instrument is inserted into the colon via the anus. It is performed under conscious sedation, a type of light anesthetic.
Surgery is almost always necessary to cure an anal fistula. The surgery is performed by a colon and rectal surgeon. The goal of the surgery is a balance between getting rid of the fistula and protecting the anal sphincter muscles, which could cause incontinence if damaged.
Fistulas in which there is no or little sphincter muscle involved are treated with a fistulotomy. In this procedure, the skin and muscle over the tunnel are cut open to convert it from a tunnel to an open groove. This allows the fistula tract to heal from the bottom up.
In the case of a more complex fistula, the surgeon may have to place a special drain called a seton, which remains in place for at least 6 weeks. After a seton is placed, a second operation is almost always performed:
A new treatment for Crohn’s disease fistulas is to inject stem cells into the fistula. Your colorectal surgeon will discuss all of your options before the surgery.
Fistula surgery is usually done on an outpatient basis, which means the patient can go home the same day. Patients who have very large or deep fistula tunnels may have to stay in the hospital for a short time after the surgery. Some fistulas may require several operations to get rid of the fistula.
Most fistulas respond well to surgery. After the surgery, your surgeon may recommend that you soak the affected area in a warm bath, known as a sitz bath and that you take stool softeners or laxatives for a week.
Since you may also have some pain or discomfort in the area after surgery, your physician will usually inject local anaesthetic such as lidocaine to decrease your discomfort and may prescribe pain pills. If opioids are prescribed, they are usually used for a very short period.
If the abscess and fistula are treated properly and healed, they will probably not come back.
The Chawla Nursing Home medical team at Chawla Nursing Home understands the risks and rewards that come with Anal Fistula Treatment, and we will help you through every step of the way. Schedule a consultation appointment with one of our doctors at our Jalandhar location to find out if Anal Fistula Treatment is your best option for prevention and safety purposes.
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