Recurrent perianal abscess

At a glance

A perianal abscess that keeps coming back is not just painful — it is a signal that something underlying needs to be addressed. While a first abscess can be a one-off event, recurrence usually points to an ongoing problem, most commonly an anal fistula.

This guide explains why abscesses recur, what the connection to fistulas is, and what people can do to break the cycle.

The recurrence pattern

People with recurrent perianal abscesses describe a distressingly familiar sequence:

1. The warning signs — a developing hardness, warmth, or ache in the perianal area
2. The build-up — increasing pain, swelling, sometimes fever
3. The emergency — the abscess reaches a point where it needs drainage
4. The relief — drainage provides dramatic improvement in pain
5. The healing — the drainage site closes over weeks
6. The return — weeks, months, or sometimes years later, the process starts again

Each cycle takes a physical and emotional toll. People describe the dread of recognising the early signs as almost as bad as the pain itself.

Why it happens

The fistula connection

The most common cause of recurrent perianal abscess is an underlying anal fistula. Here is the mechanism:

• The anal canal contains small glands that can become blocked and infected
• When infection occurs, an abscess forms — a collection of pus
• Drainage clears the acute infection, but the original tract from the gland to the skin surface remains
• This tract is the fistula — an abnormal tunnel that bacteria can travel through
• As long as the fistula exists, the area is vulnerable to reinfection

This is why drainage alone does not solve the problem. The abscess is the symptom; the fistula is the cause.

Incomplete drainage

Sometimes an abscess recurs because the original drainage was incomplete. If a pocket of infection was not fully drained, it can regrow. This is more common with complex or deep abscesses.

Underlying conditions

Some conditions increase the risk of recurrent abscesses:

• Crohn’s disease — strongly associated with perianal disease including abscesses and fistulas
• Diabetes — impaired immune function can increase susceptibility
• Immunosuppression — from medication or other conditions
• Hidradenitis suppurativa — a skin condition that can affect the perianal area

Getting investigated

If your abscess has recurred, the right step is investigation by a colorectal specialist. This typically involves:

• Physical examination — to assess for a fistula opening on the skin surface
• Examination under anaesthesia (EUA) — allows thorough assessment of the area
• MRI of the pelvis — can map fistula tracts that are not visible on the surface
• Blood tests — to check for conditions like Crohn’s disease if suspected

The goal is to identify the underlying cause so that treatment can target the root problem rather than managing each abscess as it appears.

Treatment of the underlying cause

Fistula treatment

If a fistula is identified, the treatment options depend on the type and complexity:

• Simple fistulas — may be treated with fistulotomy (laying open the tract)
• Complex fistulas — may require a seton (a thread placed through the tract), advancement flap surgery, or other specialised techniques
• The goal — to close the abnormal tract while preserving continence

Fistula treatment is a separate topic covered in our fistula basics guide, but the key point here is that treating the fistula is what breaks the abscess recurrence cycle.

Abscess management

While the underlying cause is being investigated and treated:

• Emergency drainage remains the immediate treatment when an abscess forms
• Antibiotics may be used alongside drainage but do not replace it
• Some people learn to recognise early signs and seek drainage before the abscess becomes severe
• Good perianal hygiene can help but does not prevent recurrence if a fistula is present

The emotional impact

People with recurrent abscesses describe a distinctive psychological burden:

• Hypervigilance — constantly checking for signs of recurrence
• Disrupted planning — unable to commit to events or travel because an abscess could appear
• Fatigue — emotional and physical exhaustion from repeated episodes
• Frustration with the medical system — feeling that each drainage is a temporary fix

These feelings are understandable and common. The cycle of recurrence can feel endless, but identifying and treating the underlying cause can break it.