Crohn's disease is a chronic inflammatory condition that affects the digestive track. The symptoms often cycle between mild and severe, and may include loose stools, stomach pain and cramping, weight loss, rectal bleeding and ulcers. Over half a million Americans are living with Crohn's disease. Doctors believe that Crohn's disease can be caused by both family genetics and environmental factors like germs and cigarette smoking. There is no cure for Crohn's disease but the right treatment plan can help reduce inflammation and keep symptoms under control.