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Anal Fistula
Moderate
An anal fistula is an abnormal tunnel that develops between the inside of the anus or rectum and the skin near the anus. It often develops after an infection or abscess in an anal gland. Symptoms may include persistent drainage, pain, swelling, irritation, or recurrent abscesses around the anus.
Body System
Digestive System
When to Seek Medical Attention
An anal fistula should be assessed by a healthcare professional because it may be associated with ongoing infection or an abscess. Seek prompt care for increasing pain, swelling, redness, fever, pus or drainage, or worsening symptoms. Severe pain with fever or rapidly spreading infection requires urgent or emergency assessment.
Symptoms
2
Causes
2
Treatments
5
Diet
3
Overview
An anal fistula is an abnormal tunnel that develops between the inside of the anus or rectum and the skin near the anus. It often develops after an infection or abscess in an anal gland. Symptoms may include persistent drainage, pain, swelling, irritation, or recurrent abscesses around the anus.
Symptoms 2
Fever
Painful Urination
Causes 2
An anal fistula most commonly develops after an anal abscess, which is an infected cavity near the anus. When an abscess drains but the abnormal passage between the infected gland and the skin remains, a fistula may form. Other causes include inflammatory bowel disease, repeated infections, injury, previous surgery, and certain conditions affecting the tissues around the anus.
Infection
Inflammation
Risk Factors
Risk factors include a previous anal abscess, inflammatory bowel disease such as Crohn disease, recurrent infections in the anal region, previous anal or rectal surgery, and conditions that interfere with normal healing or immunity. A history of an anal fistula also increases the likelihood of recurrence.
Diagnosis
Diagnosis is based on a patient's medical history,
symptoms, physical examination and, when necessary,
laboratory or imaging investigations.
An anal fistula is diagnosed through a medical history and examination of the anus and surrounding skin. The healthcare professional may look for an external opening, drainage, swelling, or tenderness. A digital rectal examination may help identify the tract. Imaging such as MRI or ultrasound may be used when the fistula is complex, recurrent, or difficult to identify during examination.
Prevention
Key Prevention Tips
Preventing anal fistula mainly involves reducing the risk of anal abscesses and treating infections promptly
People with inflammatory bowel disease should follow appropriate medical treatment and monitoring
Persistent pain, swelling, drainage, or recurrent abscesses around the anus should be evaluated by a healthcare professional rather than left untreated
Prevention Guidance
Preventing anal fistula mainly involves reducing the risk of anal abscesses and treating infections promptly. People with inflammatory bowel disease should follow appropriate medical treatment and monitoring. Persistent pain, swelling, drainage, or recurrent abscesses around the anus should be evaluated by a healthcare professional rather than left untreated.
Reminder: Prevention recommendations should be tailored to your personal health status and risk factors.
Treatment & Management 5
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Medical Note: The treatment information provided is intended for educational purposes only.
Always consult a qualified healthcare professional before starting,
stopping, or changing any treatment.
Diet & Nutrition 3
Recommended Foods
Protein Rich Foods
Support healing and tissue repair.
Fresh Fruits
Provide vitamins.
Vegetables
Support recovery.
Foods to Avoid
Highly Processed Foods
Provide poor nutrition.
Alcohol
May delay healing.
Medical Nutrition Note: Diet recommendations are intended for general educational purposes and should be tailored to individual health needs by a qualified healthcare professional.
Frequently Asked Questions 5
It is an abnormal tunnel connecting the anal canal and skin.
It often develops after infection or abscess formation.
Pain, swelling, and discharge near the anus may occur.
Physical examination and imaging tests may be used.
Yes, many cases require surgical treatment.
Helpful Tip: These answers provide general medical information.
Consult your healthcare provider for advice tailored to your condition.