Crohn's disease can affect women as well as men and can occur at any age. The disease usually occurs between the ages of 15 and 35
. The inflammations caused by Crohn's disease can occur in all parts of the digestive tract
, including the oral cavity, esophagus, stomach, and various parts of the intestine such as the duodenum, small intestine, and large intestine. Several areas can also be affected at the same time. Severe inflammations of the intestinal walls are often accompanied by ulcers, constrictions or fistulas. In the long run, this can affect the intestine
so strongly that the digestive processes are permanently strongly impaired.