**Crohn's disease** is a type of [[Inflammatory Bowel Disease|Inflammatory Bowel Disease]] that may affect any segment of the [gastrointestinal tract](https://en.wikipedia.org/wiki/Gastrointestinal_tract "Gastrointestinal tract"). Symptoms often include [abdominal pain](https://en.wikipedia.org/wiki/Abdominal_pain "Abdominal pain"), [diarrhea](https://en.wikipedia.org/wiki/Diarrhea "Diarrhea") (which may be bloody if inflammation is severe), [fever](https://en.wikipedia.org/wiki/Fever "Fever"), [abdominal distension](https://en.wikipedia.org/wiki/Abdominal_distension "Abdominal distension"), and [weight loss](https://en.wikipedia.org/wiki/Weight_loss "Weight loss"). Complications outside of the gastrointestinal tract may include [anemia](https://en.wikipedia.org/wiki/Anemia "Anemia"), [skin rashes](https://en.wikipedia.org/wiki/Skin_rashes "Skin rashes"), [arthritis](https://en.wikipedia.org/wiki/Arthritis "Arthritis"), [inflammation of the eye](https://en.wikipedia.org/wiki/Uveitis "Uveitis"), and [fatigue](https://en.wikipedia.org/wiki/Fatigue_(medical) "Fatigue (medical)")The skin rashes may be due to infections as well as [pyoderma gangrenosum](https://en.wikipedia.org/wiki/Pyoderma_gangrenosum "Pyoderma gangrenosum") or [erythema nodosum](https://en.wikipedia.org/wiki/Erythema_nodosum "Erythema nodosum")[Bowel obstruction](https://en.wikipedia.org/wiki/Bowel_obstruction "Bowel obstruction") may occur as a complication of chronic inflammation, and those with the disease are at greater risk of [colon cancer](https://en.wikipedia.org/wiki/Colon_cancer "Colon cancer") and [small bowel cancer](https://en.wikipedia.org/wiki/Small_bowel_cancer "Small bowel cancer")