Crohn's Disease vs. Ulcerative Colitis: Two Types of IBD
Crohn's disease and ulcerative colitis are the two main types of inflammatory bowel disease (IBD). While both cause chronic GI inflammation, they differ in location, depth of inflammation, and complication patterns. Accurate diagnosis guides treatment strategy.
Key Differences at a Glance
Shared Symptoms
- Abdominal pain
- Diarrhea
- Bloody stools
- Fatigue
- Weight loss
- Fever
Unique Indicators
- Perianal disease (fistulas, abscesses)
- Mouth ulcers
- Right lower quadrant pain
- Malabsorption
- Continuous rectal bleeding
- Urgency and tenesmus
- Left-sided abdominal pain
Professional Diagnosis
Colonoscopy with biopsy is essential for both. CT enterography or MRI enterography evaluates small bowel involvement in Crohn's. Blood and stool inflammatory markers support the diagnosis.
Treatment for Crohn's Disease
5-ASAs (limited role), corticosteroids for flares, immunomodulators (azathioprine), biologics (anti-TNF, anti-integrins, anti-IL-12/23), and surgery for complications.
Treatment for Ulcerative Colitis
5-ASAs (mesalamine — effective as maintenance), corticosteroids for flares, immunomodulators, biologics, and colectomy as a curative option for refractory disease.
When to See a Doctor
See a gastroenterologist for persistent bloody diarrhea, unexplained weight loss, or chronic abdominal pain. Seek emergency care for severe abdominal distension, high fever, or profuse bleeding.
Not sure which one you have?
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Medically Reviewed for Accuracy
Content is aligned with established clinical guidelines from authoritative medical institutions, including MedlinePlus (U.S. National Library of Medicine), the CDC, the NIH, and the NHS. All content is reviewed by our medical advisory board for accuracy and safety.