Your First Week After Fistula Surgery: What to Actually Expect

You made it through the procedure. Now you're home, probably more uncomfortable than you expected, wondering if what you're feeling is normal.

Most of it is. Here's what the first seven days actually look like.

Important: This content reflects personal experience and community-sourced tips, not medical advice. Every fistula case is different. Always discuss treatment decisions with your colorectal surgeon or gastroenterologist. What worked for one person may not be right for your situation.

First, a quick note on procedures

This article covers recovery from two common fistula surgeries: fistulotomy and seton placement. Where the experience differs, we'll break it out.

Quick reminder if you're still getting your bearings:

Fistulotomy means the fistula tract was cut open and left to heal from the inside out. It's used for simpler fistulas that don't put the sphincter muscle at significant risk.

Seton placement means a small surgical thread was passed through the tract. It stays in for weeks to months and is used for more complex cases. If this sounds unfamiliar, the article Living with a Seton: The Long Game covers it in more depth.

Day 1: coming out of surgery

You'll wake up groggy. If you were under general anesthesia, expect a sore throat from the breathing tube. Nausea is common.

The surgical area will feel numb at first. The local anesthetic your surgeon uses takes several hours to wear off. Enjoy it while it lasts.

Once it fades, the discomfort becomes real. Most people describe it as a dull, throbbing ache with significant pressure. Sitting is hard. Moving around is slow.

For seton patients specifically: you'll feel the seton in place. It feels foreign at first, like an awareness of something that shouldn't be there. That sensation fades over the first week as you adjust.

The priority on day one is simple. Rest, drink water, and take your pain medication on schedule. Don't wait until the pain spikes. Staying ahead of it is much easier than chasing it.

The first bowel movement

This is the thing everyone is scared about. It deserves a direct conversation.

For most people, it happens somewhere between day 1 and day 3. The anticipation is usually worse than the event itself. That said, it's not comfortable.

What helps:

Start stool softeners right after surgery. Your surgeon should prescribe them. If they didn't, call the office and ask. This is not optional.

Drink more water than you think you need. Fiber helps too. Psyllium husk (Metamucil or similar) is what many patients use.

A warm sitz bath before can help relax the area. A sitz bath immediately after is non-negotiable.

Expect some bleeding. A small amount of bright red blood on the toilet paper or in the bowl is normal in the first few weeks. A lot of blood, soaking through or clots, is a reason to call your surgeon.

Keep stools soft for the duration of healing. Straining slows everything down. The stool softener is there for a reason.

Drainage: what's normal

Both procedures involve wound drainage. This is one of the things nobody prepares you for adequately.

Fistulotomy patients: The wound is open and healing. You'll have drainage in the first several days, sometimes a significant amount. It may look bloody, yellowish, or clear. There will likely be an odor. This is the wound doing exactly what it's supposed to do.

Seton patients: The seton keeps the tract open by design, so drainage is ongoing. Most patients use gauze padding to manage it day to day.

What actually works for both:

Gauze pads tucked against the wound, changed after every bowel movement and at least once more during the day.

A bidet. Not a nice-to-have, a necessity. Toilet paper alone doesn't clean the area properly after surgery. If you don't have one yet, this week is the time to fix that.

Loose, breathable underwear. Friction makes everything worse.

If drainage suddenly increases, smells significantly worse than it has been, or is accompanied by a fever above 101°F, contact your surgeon. Those can be signs of infection.

Sitting: the geometry problem

Sitting is hard after fistula surgery. The surgical area is in direct contact with whatever surface you're on.

What most patients find helpful:

A coccyx cushion with a U-shaped cutout at the back. Not a ring donut, which can increase pressure in some positions. A proper coccyx design offloads weight from the surgical site.

Lying on your side when you can, rather than sitting.

Short periods in any one position. Move around more than feels necessary.

Fistulotomy patients generally find sitting more painful in week one than seton patients do. The open wound is more sensitive to pressure and friction.

You'll figure out your specific setup in the first few days. Most people land on something that works.

Hygiene: the actual routine

Keeping the area clean is the most important thing you can do. Here's what a typical day looks like:

After every bowel movement: Rinse with a bidet or squeeze bottle using plain warm water. Pat dry, do not rub. Change the dressing.

Sitz baths: Most surgeons recommend two to three per day in the first week, around 15 to 20 minutes each. Warm water is fine. Some surgeons add Epsom salt, so follow your specific discharge instructions. After a bowel movement is the most important time.

Showering: A daily shower with water running over the area is fine. Avoid scented soaps or anything with alcohol directly on the wound.

Dressing changes: More drainage means more frequent changes. When in doubt, change it.

Seton patients may receive specific instructions for cleaning around the seton itself. Follow your surgeon's guidance on that specifically.

Pain: what the first week looks like

Pain peaks in the first 24 to 48 hours and gradually improves from there. By day 5 to 7, most people notice a real difference.

The common pattern: prescription medication for the first two to three days, then transitioning to ibuprofen or acetaminophen as the pain becomes manageable. Sitz baths do double duty here, pulling weight as pain relief just as much as hygiene.

One thing worth knowing: opioid pain medication causes constipation. The more you take, the harder that first bowel movement becomes. A lot of patients find they'd rather deal with more discomfort and have an easier time in the bathroom. That's a trade-off worth thinking about.

Sleep

Getting comfortable enough to sleep takes some adjustment. Side sleeping with a pillow between your knees works for most people. Stomach sleeping is usually off the table for the first week.

Expect to be more tired than usual. Your body is doing significant healing work. The fatigue is real.

When to call your surgeon

Most of what happens in week one is normal. These are the signs that aren't:

• Fever above 101°F
• Pain that spikes significantly after day 2 or 3, rather than improving
• Drainage that suddenly increases and smells much worse
• Significant bleeding, soaking a pad or passing clots
• Swelling that seems to be spreading after day 2
• Any difficulty urinating

When in doubt, call. That's what the nurse line is for.

By the end of week one

Most people report that sitting is still uncomfortable but workable. Pain is noticeably lower than the peak. They've figured out a hygiene routine. They have a clearer sense of what's normal for their situation.

Week two is meaningfully easier than week one for most people.

Fistulotomy patients are still early in healing. The wound won't be fully closed for several weeks, but the hardest part is behind you.

Seton patients are settling into a longer process. The week after placement is typically the hardest stretch. It gets more manageable.

If you're a seton patient and want to understand what the next few months look like, Living with a Seton: The Long Game covers the day-to-day reality in detail.