Abscess and Fistula Explained
An anal abscess is a painful collection of pus near the anus, usually from a blocked anal gland — it needs prompt drainage. After an abscess, a fistula (a small tunnel connecting the anal canal to the skin) can form in some people, causing recurrent discharge, irritation and sometimes recurrent abscesses. Fistulas rarely heal on their own and usually need surgery.
Some fistulas are linked to conditions like Crohn's disease, which require additional management.
Surgical Treatment Options
- Fistulotomy: Laying the tunnel open to heal — highly effective for simple, low fistulas.
- Seton placement: A thread placed through the fistula to drain it and protect the sphincter, often a staged approach for complex fistulas.
- LIFT procedure: Ligation of the fistula tract — a sphincter-sparing option for some fistulas.
- Advancement flap / bioprosthetic plug: For complex or high fistulas where preserving continence is critical.
The choice balances cure rates against protecting the anal sphincter (to avoid incontinence).
Recovery
- Simple fistulotomy: Day surgery; wound heals over a few weeks with sitz baths and dressings.
- Complex / seton: May involve staged procedures over months; the surgeon monitors healing and sphincter function.
When to Seek Care
See a colorectal surgeon for a painful anal lump (possible abscess — often urgent), recurrent discharge or irritation near the anus, or recurrent abscesses. Early, appropriate surgery gives the best chance of cure while protecting continence.
Frequently Asked Questions
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Browse colorectal surgeons →A simple fistulotomy costs roughly S$3,000–S$6,000+ privately; complex fistula surgery (seton, LIFT, flap) costs more and may involve staged procedures. Subsidised rates apply at public hospitals. The surgery is medically necessary and Medisave-claimable up to limits.
Anal fistulas rarely heal without treatment and tend to cause recurrent discharge or abscesses. Surgery is usually required. An abscess, in contrast, needs prompt drainage and shouldn't be left untreated.
A key goal of fistula surgery is protecting the anal sphincter to preserve continence. Simple, low fistulas can be safely laid open; complex or high fistulas are treated with sphincter-sparing techniques (seton, LIFT, flap) to minimise any risk to bowel control.
Yes. Surgery for an anal fistula or abscess is medically necessary and Medisave-claimable up to surgical limits, often with Integrated Shield Plan coverage. Confirm with the clinic.
General information only — not medical advice. Always verify a doctor’s SMC registration and discuss your individual circumstances with a qualified specialist.