An inflammatory bowel disease, Crohn's disease causes inflammation, swelling and ulcers in the digestive tract, according to WebMD. Symptoms of Crohn's disease include abdominal pain, diarrhea, blood in stools, weight loss and anal fissures.
Crohn's disease has no known cure, but patients receive treatment to control the symptoms, says Mayo Clinic. The symptoms may start suddenly or increase in strength gradually. Some patients experience extended periods of remission when no symptoms appear.
Over time, Crohn's disease can affect the normal functioning of the body. Some patients experience malabsorption, which prevents the body from properly absorbing nutrients, notes the Cleveland Clinic. Scar tissue can develop over time causing bowel blockage.