Crohn's Disease Education
High-level guidance for learning and care conversations.
What it is
Crohn's disease is a chronic inflammatory bowel disease (IBD). It causes inflammation and ulcers along the digestive tract; inflammation can occur in different segments from the mouth to the anus, depending on the person. It is distinct from ulcerative colitis, another form of IBD that mainly affects the colon, though both share some features and treatments.
According to NIDDK, experts are not sure what causes Crohn's disease; one factor under study is an abnormal immune reaction in which the immune system may attack bacteria that normally live in the intestines, leading to inflammation. Environment, genes, and the microbiome are also areas of active research.
Start here: NIDDK: Definition & facts for Crohn's disease and symptoms & causes.
Diagnosis and monitoring
Diagnosis is made by specialists using medical history, exam, lab tests, imaging, and often endoscopy (for example colonoscopy or upper GI endoscopy) to see inflammation and take biopsies. Because Crohn's can mimic other conditions, accurate evaluation matters. Long-term care focuses on controlling inflammation, relieving symptoms, healing the intestine when possible, and reducing complications.
Common care approach
- Ongoing care with gastroenterology; treatment targets inflammation, not only symptoms.
- Medicines may include aminosalicylates, corticosteroids, immunosuppressive drugs, biologic therapies, antibiotics, or other agents—choices depend on disease location, severity, and individual response (see NIDDK treatment overview).
- Bowel rest with specialized nutrition is sometimes used in specific situations; surgery may be needed for strictures, fistulas, bleeding, or when medicines are not enough.
- Nutrition: NIDDK notes that no single eating pattern cures Crohn's, but diet changes can help symptoms and replace lost nutrients—especially important for children and teens.
NIDDK: Treatment for Crohn's disease · Eating, diet, & nutrition for Crohn's disease.
Questions to discuss with your care team
- How do we track whether inflammation is improving?
- What are signs that I should call the clinic urgently?
- How should I adjust eating patterns during flare vs remission?
- What side effects should I monitor from current medications?
Trusted resources
- NIDDK: Crohn's disease — NIH patient information (definition through diet)
- CDC: Inflammatory bowel disease (IBD) — U.S. public-health overview of IBD burden and care themes
- MedlinePlus: Crohn's disease (National Library of Medicine)
- Crohn's & Colitis Foundation — patient education and support (U.S.)