Crohn's Fistula: Symptom List and When to Call Your IBD Team

Updated 3 October 2026

A fistula can make an ordinary day hard to predict: pain that depends on the chair, drainage that changes, and a bathroom schedule you have to plan around.

This guide covers what to write down on fistula days, including pain by situation, drainage, stool form, comfort measures, and medicines, which warning signs call for a same-day message or your local emergency number, and how to prepare for the IBD visit. It does not cover how procedures are done.

What a Crohn’s fistula can feel like from one day to the next

Crohn’s & Colitis UK explains that around 1 in 3 people with Crohn’s develop a fistula at some point, and that fistulas around the anus are the most common type. A first sign is often a tender lump near the anus, followed by pain and irritation that get worse when you sit, move around, have a bowel movement, or cough, and pus, stool, or blood may drain from the opening (Crohn’s & Colitis UK).

Cleveland Clinic adds swelling and redness around the anus, drainage that may have a smell, and, less often, fever, pain when you urinate, or trouble holding stool in (Cleveland Clinic). It also notes that an older fistula can close at the surface while the tunnel remains, causing pain and swelling until it reopens and drains.

A systematic review of population-based studies found that about 1 in 5 people with Crohn’s develop perianal disease within 10 years of diagnosis (Epidemiology and Natural History of Perianal Crohn’s Disease), so a fistula is a recognized part of the condition and nothing you caused.

That up-and-down pattern is why single-day notes matter. Fistula days rarely look alike, and the details that change are the ones your IBD team asks about:

• Pain, with the situation: sitting, walking, bowel movements, or coughing
• Swelling or a tender lump, and whether it changed since yesterday
• Drainage: type, amount, and smell
• Bowel function: stool form, urgency, and any leakage
• Fever readings, if you feel unwell

In Crohn's Journey (by Health Journey Labs), the Daily check-in records pain, sleep, and the rest of the day in one pass, so a bad fistula day sits among your other signals. The Flare Tracker singles out a day that sits far above your usual hard days, saved with onset, intensity, and a short note. Across weeks, the pattern shows whether those flagged days repeat.

Fistula drainage with Crohn's: type, amount, and smell

Drainage is the detail teams ask about most, yet it is the one people forget by the time of the appointment. Crohn’s & Colitis UK lists pus, stool, or blood draining from the fistula opening, and Cleveland Clinic notes it can have a smell (Crohn’s & Colitis UK).

Crohn’s & Colitis UK suggests wearing an incontinence pad, sanitary pad, or panty liner if there is discharge, which also gives you an easy way to measure it. Pad counts are a better yardstick than a guess.

From Crohn's Journey, we recommend writing the pad count each evening with a one-line description, because totals compare across weeks far better than memories do.

Drainage table, by Crohn's Journey

Note any change that arrived suddenly, such as drainage that stops and pain that rises. That combination can mean the tunnel is closing at the surface, which is worth reporting to the team.

In Crohn's Journey, the Daily Journal takes a typed line or a spoken one about bathroom planning and what the day limited, so a quick description after a bathroom visit is enough. Each note lands beside your scores and other history for context. Over a few weeks, the pattern of drainage and pain becomes easier to describe.

Fistula pain with Crohn's by situation: sitting, walking, bowel movements, coughing

Fistula pain depends on what you are doing. Crohn’s & Colitis UK says the pain can get worse when you sit down, move around, go to the bathroom, or cough, and it suggests cushions, loose clothing, and lying on your side when sitting is painful (Crohn’s & Colitis UK). A single daily number hides these differences.

A situation-based score takes seconds and tells your clinician far more:

Pain situation checklist, by Crohn's Journey

• ☐ Sitting at a desk or in a car, 0 to 10
• ☐ Walking or standing, 0 to 10
• ☐ During and after a bowel movement, 0 to 10
• ☐ Night pain that wakes you, yes or no
• ☐ Pain relief used, with the time and whether it helped

Crohn’s & Colitis UK also notes that NSAIDs such as ibuprofen, diclofenac, and aspirin may trigger a flare for some people with Crohn’s, and that acetaminophen is likely to be the safest choice. Your IBD team should decide what to use, so write down what you take rather than changing anything on your own.

With Crohn's Journey, the Daily check-in holds pain and sleep scores for each day. Custom symptoms inside it let you add labels such as “pain when sitting” or “pain during bowel movements”. Because the labels stay the same each day, the pattern shows which situation stays worst and whether it eases after a treatment change.

Stool form, urgency, and leakage with Crohn's: the bowel side of a fistula day

A fistula near the anus can change how bowel movements feel and how reliably you can hold them. Cleveland Clinic lists difficulty holding stool in as a less common symptom. Crohn’s & Colitis UK warns that constipation can mean straining, which can cause pain or complications, and it recommends drinking plenty of fluids and asking your doctor about softeners (Crohn’s & Colitis UK).

The Bristol Stool Scale gives you a shared language with your team. Log each day:

Bowel side checklist, by Crohn's Journey

• ☐ Stool form on the Bristol Scale (types 1 to 7) and the number of bowel movements
• ☐ Urgency: able to wait, or not
• ☐ Any leakage or accidents, and where you were
• ☐ Straining or incomplete emptying
• ☐ Meals and drinks before bad bathroom hours

Remember to log trouble controlling your bowels together with pain and drainage, since Crohn’s & Colitis UK lists that combination in its urgent warning signs, with fever or vomiting.

The Stool Tracker (Bristol Scale) in Crohn's Journey records Bristol form, urgency or bathroom load, and quick tags, and it reads them against pain, meals, and energy. The Food Tracker stores meal and drink lines beside louder pain, urgency, and stool changes. The pattern shows which meals come before your worst bathroom days.

Skin care and comfort with a Crohn's fistula: what helped

Crohn’s & Colitis UK shares practical comfort tips: keep the area clean, pat the skin dry rather than rubbing, avoid scented soap and shower gel, use a barrier cream only if your doctor prescribes it, and try cushions or warm baths without soap or salt for relief (Crohn’s & Colitis UK). It advises talking to your IBD team about the best ways to keep the fistula clean, avoid infection, and protect the skin.

You do not need to track every routine. A single line of comfort notes is enough to show what helps:

Skin care list, by Crohn's Journey

• What you tried today, such as a cushion, a warm bath, or loose clothing
• Comfort afterward, from 0 to 10
• Skin around the opening: stable, sore, or worse
• Anything that made the area worse

Pairing one change with one result for a few days teaches you more than a long list of unrelated tips.

In Crohn's Journey, Weekly Goals lets you set a single modest target, for example a cushion on workdays, then mark whether it held. The goal is read together with your real check-ins. A couple of weeks later, the pattern shows whether the aim moved comfort or pain in either direction.

Medicines, tests, and procedures with Crohn's: you record dates, the team decides

Crohn’s & Colitis UK describes treatment as medicines, surgery, or both, chosen by the IBD team for each fistula type. For perianal fistulas, it says antibiotics may ease discharge, biologic medicines can help start healing, and around 2 in 3 people with Crohn’s who have an anal fistula need an operation at some point (Crohn’s & Colitis UK). It also says relapse is possible, in around 1 in 3 people. The NIDDK adds that 30% to 55% of people with Crohn’s need surgery within 10 years after diagnosis, most often for complications such as fistulas and abscesses (NIDDK).

This guide does not cover how treatments work. What you can do is keep an exact record that your team can read quickly:

Checklist of medicines and procedures, by Crohn's Journey

• ☐ Each medicine, with the prescriber, the start date, and any change
• ☐ Doses and timing exactly as prescribed
• ☐ Dates of scans, exams, and procedures, and which clinician did them
• ☐ Drainage and pain in the weeks before and after each change
• ☐ Questions you want answered at the next visit

Never stop or alter a medicine on your own, particularly if you are already taking steroids; the same source notes that your doctor may tell you to stop steroids if you have a fistula, because they can raise infection risk.

The My Meds tool in Crohn's Journey holds each prescription you take, from biologics to steroids, with its schedule and strength. My Labs stores the dates and results of blood counts, stool tests, calprotectin, and imaging. The pattern around each date shows what your drainage and pain did after a change.

Crohn's fistula: when to call your care team or your local emergency number

Crohn’s & Colitis UK advises contacting your IBD team if you think you have a fistula, and seeking urgent help if you have a temperature, pain with pus drainage, trouble controlling your bowels, vomiting, or ongoing abdominal pain (Crohn’s & Colitis UK). Fever plus a painful, swollen area deserves a same-day call.

The same page lists warning signs of sepsis, a life-threatening reaction to infection that can follow an abscess: high temperature or fever with chills and shivering, or a low body temperature, mottled or discolored skin, no urine all day, a fast heartbeat or fast breathing, sudden confusion or slurred speech, and a rash that does not fade under a glass. If you notice any of these, call your local emergency number.

Warning sign list, by Crohn's Journey

• Same-day call to your IBD team: new lump or swelling, new or increased drainage, worsening pain, or a fever reading
• Your local emergency number: any of the sepsis signs listed above

Do not wait to record these. Act first and write it down afterward.

Once you are safe, the Flare Tracker in Crohn's Journey can hold the day and hour a sign began and how it changed. Teams find a clear timeline easier to act on than a recollection. The history can then show whether earlier days carried the same early signs.

Preparing for the visit about a Crohn's fistula: questions and a one-page summary

Crohn’s & Colitis UK says your IBD team should explain the treatment choices and the pros and cons of each, and encourages you to ask as many questions as you need. It also lists the exams your team may use to map a fistula, such as an examination under anesthesia, pelvic MRI, and endoanal ultrasound (Crohn’s & Colitis UK).

A summary page for the visit (a step in the Crohn's Journey checklist for IBD visits) can include:

Fistula visit checklist, by Crohn's Journey

• ☐ Two to four weeks of pain by situation, drainage notes, and stool form
• ☐ Flare days since the last visit, with dates
• ☐ Medicine list and any change
• ☐ Fever readings and any urgent calls
• ☐ Impact on sleep, work, and intimacy, if you wish to raise it

Questions to consider: What type of fistula do I have? Which changes should make me call the same day? How will we judge healing, and when are the next scans? Who do I call after hours?

The Doctor Report in Crohn's Journey turns the logged weeks into one page covering dates, stool and meal context, symptoms, and function. My Care Team keeps visit notes, which matters because visits often focus on stool count rather than function. Both draw on the history, so the pattern is ready before you walk in.

How Crohn's Journey can help

A small notebook can hold pain scores and pad counts. Reading drainage, pain, stool form, and medicines together over weeks is the part an app helps with, and the best Crohn’s disease apps comparison compares your options. Related guides: how to start tracking Crohn’s symptoms is for the first weeks, tracking Crohn’s meds beside flare and fatigue weeks explains medicine records, and what to bring to a 15-minute Crohn’s visit helps with the appointment.

Crohn's Journey is a personal Crohn's tracker from Health Journey Labs on the App Store and Google Play. It lets you score pain and bathroom load daily, flag the days that go clearly wrong, log medicines and test dates, and keep each clinician’s notes. That single timeline lets your IBD team read the same weeks you lived, so changes in drainage or pain after a treatment change are easier to recognize. Below is what you can use and how each part helps.

• Stool Tracker (Bristol Scale) — Bristol Scale form, urgency or bathroom load, and quick tags, read against pain, meals, and energy.
• Food Tracker — Meal and drink lines read with louder pain, urgency, energy, stool, and sleep across the week.
• Flare Tracker — A flag for a day that overshoots your usual hard days, saved with onset, intensity, and a short note, which separates one-off spikes from repeating ones.
• Daily check-in — A guided daily pass over symptoms, mood, food, sleep, exercise, medicines, and outside factors.
• Daily Journal — Free text or spoken entries for what a score cannot hold: bathroom planning, what the day limited, conversations with a partner, visit debriefs, and guilt after canceling plans.
• Weight Tracker — Scale or body notes, including weight loss or clinic weigh-ins when a clinician is watching them, read with stool, meals, energy, and sleep.
• My Meds — The medicines you actually take, such as biologics or steroids, with each name, schedule, and strength, read against stool weeks, pain, and sleep.
• My Labs — Dates and results for blood counts, stool tests, calprotectin, imaging, and similar tests, shown beside symptoms and function.
• Weekly Goals — A single modest target for the week and a mark for whether it held, compared with your real check-ins.
• Learn — Short lessons on flares, pacing, bathroom load, and visit preparation, tied to your own logged weeks.
• AI companions — Clara and specialist companions for knowledge, fitness, nutrition, and relationships, with your logged history in view; used for visit wording, a calm script for a partner, a soft rain-check line, or a listening ear after a hard bathroom day.
• My Assessments — Structured check-ins beyond daily scores, plus onboarding questions about your life and social context.
• My Care Team — Clinician entries with short visit notes; helpful when visits focus on stool count rather than function. Use it to plan questions, write during the visit, and review afterward.
• Doctor Report — A single-page summary built from your logged history: dates, stool and meal context, symptoms, and daily function.
• Period Tracker — Bleeding dates from first to last day, flow level, and whether a day felt heavy or light, read with pain, stool, energy, and the rest of your log.

Everything you log builds one history, and insights get stronger as it grows. Custom symptoms let you add your own labels.

Sources

• Crohn’s & Colitis UK — Fistulas (updated January 2026)
• Cleveland Clinic — Anal fistula (reviewed July 2023)
• NIDDK — Treatment for Crohn’s Disease
• Epidemiology and Natural History of Perianal Crohn’s Disease: A Systematic Review and Meta-Analysis of Population-Based Cohorts (PMC)

FAQ

The answers below draw on the sources cited in this guide, and the app they mention is Crohn's Journey (by Health Journey Labs).