Fistula-In-Ano
What is an Anal Fistula?
An anal fistula is an abnormal tunnel connecting the inside of your anus to the skin outside, often caused by an infection (perianal abscess) in the anal glands.
Prevalence:
- Common condition, twice as likely in men.
- Half of those with an infected anal gland develop a fistula.
Symptoms:
- Intense, throbbing anal pain (worse during pooping, sitting, or coughing).
- Swelling, redness, and drainage of pus, blood, or stool near the anus.
- Less common: fever, difficulty holding stool, or pain during urination.
Appearance:
Looks like a small hole near the anus, often with drainage. Older fistulas may close but cause swelling and pain until they reopen.
Causes:
- Common: Perianal abscess.
- Uncommon: Crohn’s disease, anal STIs, tuberculosis, trauma, radiation therapy, and certain infections or skin conditions.
