If you have Crohn's disease that affects your large bowel(colon), you will have a higher risk of developing bowel cancer. 1 in 20 people with Crohn's disease will develop bowel cancer in the 10th year after their condition is diagnosed. Active Crohn's disease may cause other problems e. g. mouth ulcers, joint pain, red, sore eyes and rashes. With severe, long-term inflammation, you may develop complications. The main complications include: development of a fistula-an abnormal connection between two parts of your body. In Crohn's disease, fistulas usually form between your bowel and your skin, an abscess in your abdomen-this is a collection of pus caused by an infection and or a stricture-can also appear.
Attribution: BUPA