The Five Types of Crohn’s Disease


Most people with Crohn’s disease suffer from ileocolitis. This form of Crohn’s disease causes inflammation and irritation of the ileum (the lower part of the small intestine) and colon. Those with ileocolitis may experience symptoms such as:

  • diarrhea
  • significant weight loss
  • pain or cramping in the middle or lower-right region of the abdomen


Like ileocolitis, ileitis causes inflammation and irritation of the ileum. The symptoms for ileitis are the same as those for ileocolitis. People with ileitis may also develop fistulas (inflammatory abscesses) in the lower-right section of the abdomen.

Gastroduodenal Crohn’s Disease

Gastroduodenal Crohn’s disease affects the stomach and duodenum (the first part of the small intestine). Those with this form of Crohn’s disease often experience nausea, lack of appetite, and weight loss.

People who have gastroduodenal Crohn’s disease may also vomit if small parts of the bowel become blocked. This is because of intestinal inflammation.


Jejunoileitis occurs in the jejunum, or the second part of the small intestine, where it causes areas of inflammation. Those with jejunoileitis may experience symptoms including:

  • cramps after meals
  • fistulas
  • diarrhea
  • abdominal discomfort that can sometimes be severe

Crohn’s (Granulomatous) Colitis

This type of Crohn’s disease affects the colon, which is the main part of the large intestine. It can cause fistulas, ulcers, and abscesses to form around the anus. It can also cause symptoms including:

  • skin lesions
  • joint pain
  • diarrhea
  • rectal bleeding


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