What this experience covers
This experience follows the day-by-day reality of bilateral advancement flap surgery for an anal fistula. It is a composite drawn from many anonymised accounts and represents common patterns, not any single person’s story.
Advancement flap procedures are typically used for complex fistulas where simpler approaches like fistulotomy carry too high a risk to the sphincter muscle. The surgery involves covering the internal fistula opening with a flap of healthy tissue. When bilateral, flaps are used on both sides.
The pattern
Before surgery
People describe the lead-up to flap surgery as shaped by a particular kind of weariness. Most have already been through other treatments — setons, fistulotomies, sometimes multiple procedures. Flap surgery is rarely the first option. It is where people land when simpler approaches have not resolved the fistula.
The pre-surgical instructions typically involve bowel preparation, fasting, and sometimes a course of antibiotics. People describe following these instructions meticulously — by this point, they understand that preparation matters.
The first few days
The first three to four days after flap surgery are described as the hardest part. People report:
- Significant pain at the surgical site, often managed with prescribed painkillers
- Anxiety about the first bowel movement — a universal concern
- Difficulty finding a comfortable position for sitting or sleeping
- Discharge from the wound that requires regular pad changes
- A feeling of vulnerability — the flap needs to heal undisturbed
The first bowel movement is a major psychological hurdle. People describe dreading it, then finding it either surprisingly manageable or more uncomfortable than expected. Keeping stools very soft with stool softeners started before surgery is described as essential.
Weeks 1 to 2
By the end of the first week, the acute pain is typically settling. People describe:
- Transitioning from prescribed painkillers to over-the-counter options
- Sitz baths becoming a cornerstone of the daily routine
- Discharge continuing but gradually decreasing
- Short walks resuming — gentle and slow
- A hyper-awareness of the surgical area, monitoring every sensation
The second week brings a shift toward cautious normality. People return to light activities around the house, though sitting for long periods remains uncomfortable.
The waiting period
Flap surgery has a particular emotional quality that distinguishes it from other fistula procedures: the waiting to find out if the flap has taken. People describe a period of weeks where they are watching for signs that the flap has survived and the fistula is closing.
Signs people look for include decreasing discharge, less pain at the surgical site, and the absence of the familiar fistula symptoms. This waiting period is described as one of the most anxious phases of the entire fistula journey.
What people wish they had known
- That flap surgery recovery is slower than fistulotomy — weeks rather than days to feel significantly better
- That the first bowel movement anxiety is universal and usually worse in anticipation than reality
- That discharge is normal and can continue for several weeks
- That the emotional weight of hoping the flap has worked is significant and worth preparing for
Every recovery looks different. If you are wondering whether what you are experiencing is normal for your stage, our chat can help you think through your specific situation.
When to contact your doctor
Seek medical attention if you experience:
- Heavy or persistent bleeding that does not settle
- Severe pain that is getting worse rather than better
- Fever or signs of infection
- Increasing discharge with a foul smell
- Any symptoms that concern you