Common symptoms
Symptoms depend on whether infection is actively blocked, draining or forming a new abscess.
Pus or blood-stained discharge
Tender swelling
Skin irritation and wetness
Fistula Info
Fistula Symptoms
Anal fistula often causes repeated discharge from a small opening near the anus, with swelling or pain that returns. Symptoms may improve temporarily after drainage and then recur.
Patient Guide
Fistula Symptoms
Recognise anal fistula symptoms such as pus discharge, recurrent swelling, pain, skin irritation, bleeding and abscess history.
Symptoms that need urgent review
Severe pain, fever, spreading redness or inability to sit may indicate abscess.
Fever or chills
Rapidly increasing swelling
Severe throbbing pain
What doctors check
The exam focuses on finding the external opening, internal opening and any active abscess.
Local inspection
Digital rectal examination if tolerated
MRI or ultrasound when needed
Related Reading
Explore Related Topics
Continue learning about anal fistula — each linked topic adds important clinical context to help you prepare for your consultation.
FAQ
Frequently Asked Questions
Can fistula symptoms come and go?
Yes. Discharge may reduce temporarily, then return when the tract fills again.
Is discharge always pus?
It may be pus, fluid or blood-stained discharge. Persistent wetness near the anus should be evaluated.
Can fistula be mistaken for piles?
Yes. Pain and bleeding can overlap, but recurring pus discharge points more toward fistula.
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Care Notes
Recurring discharge is common
Pain may rise before drainage
Fever can signal abscess
Medical references used for this guide
This page is educational and does not replace a clinician's examination. References reviewed include ASCRS abscess and fistula patient information, Johns Hopkins anal fistula guide, and Simple fistula-in-ano systematic review.