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About Anal Fistula
Anal fistula is a common anorectal condition that affects thousands of people worldwide. It is an abnormal tunnel that forms between the anal canal and the skin around the anus, usually as a result of an infection or abscess.
Early diagnosis and treatment are important to prevent recurrent infections and complications. Book an appointment with the experienced specialists at IMG Healthcare to learn more about the symptoms, causes, diagnosis, and advanced laser treatment options for anal fistula.
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What is Anal Fistula?
An anal fistula is an abnormal tunnel that forms between the anal canal and the skin surrounding the anus. It usually develops after an infection in one of the small glands inside the anus, resulting in an abscess.
The anus contains several glands that produce mucus. If one of these glands becomes blocked and infected, an abscess may form. In many cases, the abscess can create a passage to the skin surface, leading to the development of an anal fistula.
How Does An Anal Fistula Form?
An anal fistula usually develops after an anal abscess. When an infected abscess near the anal glands is not treated or does not heal completely, it may create a tunnel between the anal canal and the skin around the anus.
Over time, this abnormal passage allows pus or fluid to drain continuously, resulting in an anal fistula.
Causes of Anal Fistula
Symptoms of Anal Fistula
Around 50% of anal fistulas develop as a result of an anal abscess. Other possible causes include:
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Anal abscess or untreated infection
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Hidradenitis suppurativa (a chronic skin condition causing abscesses and scarring)
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Crohn’s disease
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Diverticulitis
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Sexually transmitted infections (STIs)
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Tuberculosis (TB) or HIV infection
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Pain, swelling, redness, and tenderness around the anus
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Fever (especially if an infection is present)
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Increased pain while sitting, coughing, or during bowel movements
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Pain during bowel movements or constipation
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Painful urination in some cases
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Foul-smelling discharge or pus from the skin near the anus
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Rectal bleeding (occasionally)
DIAGNOSIS
Your doctor will review your medical history, assess your symptoms, and perform a physical examination of the anal region. If an anal fistula is suspected, additional tests may be recommended to determine its location and extent.
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Digital Rectal Examination :
A gloved, lubricated finger is gently inserted into the rectum to check for abnormalities or signs of a fistula.
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Visual Examination :
The doctor may use instruments such as an anoscope, proctoscope, or sigmoidoscope to examine the anal canal and lower rectum.
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Anoscopy :
Anoscopy allows the doctor to inspect the inside of the anus and rectum for inflammation, abnormal openings, or other conditions.
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Sigmoidoscopy :
A flexible sigmoidoscopy may be performed to evaluate the lower part of the colon and identify any underlying disease contributing to the fistula.
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Imaging Tests :
If the fistula tract is not clearly visible, imaging tests such as an endoanal ultrasound, MRI, CT scan, or other appropriate studies may be recommended to accurately define its course and extent.
Post-Treatment Care for Anal Fistula
Most patients recover well after anal fistula surgery. To support healing, your doctor may recommend:
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Taking warm sitz baths to keep the area clean and reduce discomfort.
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Using stool softeners or laxatives for a short period to avoid straining during bowel movements.
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Taking prescribed pain medications to manage post-operative discomfort.
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Following proper wound care instructions and attending scheduled follow-up visits.
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Regular follow-up with your doctor is important to monitor healing and reduce the risk of recurrence.
Precautions After Surgery
Mild pain or discomfort after anal fistula surgery is common. For a smooth recovery, your doctor may recommend:
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Soaking the affected area in a warm sitz bath.
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Taking prescribed pain medications as directed.
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Using stool softeners or laxatives for about a week to avoid straining.
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Following a nutritious, high-fiber diet and staying well hydrated to promote healing.
Prevention of Anal Fistula
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While not all cases can be prevented, the following measures may help reduce the risk of developing an anal fistula:
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Eat a high-fiber diet: Include whole grains, oats, beans, lentils, fruits, and vegetables to promote regular bowel movements and prevent constipation.
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Drink plenty of water: Staying well hydrated helps soften stools and reduces straining during bowel movements.
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Maintain good anal hygiene: Keep the anal area clean and dry to reduce the risk of infection and irritation.
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Avoid straining during bowel movements: Do not spend excessive time on the toilet, as prolonged straining can increase pressure on the anal region.
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Stay physically active: Regular moderate exercise supports healthy bowel function and overall digestive health. Avoid prolonged sitting and excessive heavy lifting if possible.
ANAL FISTULA SPECIALISTS DOCTORS
Dr. ABCD
MBBS,
10 yrs of experience
Dr. ABCD
MBBS,
10 yrs of experience
Dr. ABCD
MBBS,
10 yrs of experience
Anal Fistula Surgery
Once an anal fistula develops, it usually does not heal with antibiotics or home remedies alone and often requires surgical treatment. Common treatment options include:
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Fistulotomy: The fistula tract is opened and allowed to heal from the inside out. This is a commonly performed procedure and is often done as a day-care surgery.
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Laser Surgery for Anal Fistula: A minimally invasive procedure that uses laser energy to close the fistula tract. It is associated with less pain, faster recovery, and minimal damage to the surrounding sphincter muscles, making it a suitable option for selected patients.
Complications of Anal Fistula
If left untreated, an anal fistula can lead to serious complications, including recurrent infections, repeated abscess formation, persistent pain, and the spread of infection to surrounding tissues. In severe cases, untreated infection may progress to sepsis, a potentially life-threatening condition that requires immediate medical attention.
Early diagnosis and timely treatment can help prevent these complications and improve long-term outcomes.