Crohn's flare: what to do
Content note: Educational content aligned with publicly available patient materials from the Crohn's & Colitis Foundation and other major IBD education sources. Content is used under license from the Foundation for patient education; the Foundation does not endorse IBDPal or MediVue products or services. Last reviewed August 2026. Not individual medical advice.
Educational use only. IBDPal does not provide medical advice, diagnosis, or treatment. Always consult your gastroenterologist or IBD care team for personal decisions.
A Crohn's flare means symptoms have worsened beyond your usual baseline, often signaling increased inflammation. Medical decisions belong with your IBD team. This guide covers recognizing flare signs, first 24 to 48 hour steps, hydration, diet, when to call for help, logging, medications, and mental health. Education only, not medical advice.
Topics: crohn's flare what to do, IBD flare management, crohn's attack help, worsening crohn's symptoms
Recognizing flare signs early
Compare current symptoms to your typical remission pattern. More frequent stools, new or heavier bleeding, worsening pain, fever, fatigue, mouth sores, or unintended weight loss may signal a flare.
Nighttime bowel movements, cramping that limits activity, or joint pain can accompany bowel inflammation. Note when changes started and whether they are accelerating. Symptom patterns tracked over several days are more useful to your clinician than a single snapshot.
A single bad day differs from a sustained trend. Track three to seven days before deciding it is a true flare versus a brief stomach bug. Discuss how this topic applies to your current disease activity with your gastroenterologist. Logging patterns in IBDPal or a notebook helps clinicians see trends beyond a single visit.
First 24 to 48 hours at home
Contact your IBD team using their flare pathway if symptoms exceed your written plan. Many clinics offer nurse triage or on-call GI coverage.
Rest, simplify meals, and pause nonessential stress where possible. Gather recent labs, medication list, and symptom log for the call. Write down questions for your gastroenterologist before each visit so limited appointment time is used well.
Do not start steroids left over from prior years or borrow a friend's medication unless your clinician explicitly instructs you. Bring these observations to your next IBD appointment so your team can personalize advice. Children, older adults, and post-surgical patients may need modified guidance from specialists.
Hydration, electrolytes, and diet adjustments
Increase fluids with water, oral rehydration solutions, or broth if your team approves. Diarrhea and fever raise sodium and potassium needs.
Shift toward softer, lower-fiber foods temporarily if they reduce irritation. Bananas, rice, applesauce, eggs, and lean protein are common short-term choices. Medication adherence and follow-up labs are as important as diet changes for many IBD patients.
Alcohol, heavy spices, and large high-fat meals often worsen symptoms. Reexpand diet when inflammation improves with medical treatment. Your GI team can adjust recommendations based on labs, imaging, and symptom trends. Second opinions are reasonable when plans feel unclear or symptoms persist despite treatment.
When to call GI, urgent care, or the ER
Call your GI team for worsening stool count, blood, pain, or fever according to your action plan. Same-day nurse triage may prevent ER visits.
Urgent care can help with dehydration assessments, fever workups, or pain control when GI is unreachable, if they coordinate with your records. Tell your team about travel, work stress, sleep changes, and menstrual cycle timing when symptoms shift.
Go to the emergency room for severe abdominal pain, fainting, heavy bleeding, persistent vomiting, high fever, or signs of dehydration despite fluids. Trust your instinct when symptoms feel unlike prior flares. Patient education supports shared decision making; it does not replace individual medical assessment.
What to log, medications, and mental health
Log stool frequency, blood presence, pain score, temperature, weight, and foods tolerated. Photos of stool are usually unnecessary unless your team requests them.
Take prescribed maintenance and rescue medications on schedule. Missing biologics or immunomodulators can prolong flares. Ask about drug levels or stool calprotectin if flares repeat. Bring prior colonoscopy, imaging, and pathology reports when seeing a new IBD specialist.
Flares increase anxiety and sleep disruption. Brief walks, breathing exercises, and counseling referrals help. You are not failing because a flare occurred; inflammation needs medical attention. If symptoms worsen while you try these steps, contact your clinic using your flare pathway.
Practical tips
- Save your clinic flare hotline and after-hours number now.
- Keep oral rehydration packets and bland foods stocked.
- Log symptoms daily during flares for faster triage.
- Never change biologics or steroids without clinician guidance.
- Tell someone you trust when symptoms worsen for emotional support.
Related resources
Common questions
How do I know if it is a flare or a virus?
Duration, blood, joint pain, and comparison to your baseline help. Your GI team may order stool tests or labs.
Should I go to the ER for blood in stool?
Heavy bleeding, dizziness, or large clots need urgent evaluation. Call your team for guidance on moderate changes.
Can stress alone cause a flare?
Stress affects symptoms and may influence inflammation for some people. Medical assessment still matters when bowel symptoms change.
Free tools on ibdpal.org
Track nutrition and symptoms, explore our community map, read the blog, or download the IBDPal iOS app.
Educational only. IBDPal does not provide medical advice, diagnosis, or treatment. Always consult your gastroenterologist or IBD care team for personal decisions.