According to the article, Crohn's disease is an inflammatory bowel disease .Other common types of IBD include ulcerative colitis and microscopic colitis.Crohn's cause is unknown and this happens when the immune system attacks healthy cells. The disease can be hereditary, for example: we can inherit it from our parents, our grandparents, etc.People who are smoking may have a double chance of having this problem. Another factor that can increase the chances of having this disease are uncontrolled use of antibiotics, antibiotics, birth control pills, high-fat diet ,and non-steroidal anti-inflammatory drugs.