Crohn's Disease
Symptoms of Crohn's disease include chronic or intermittent bouts of diarrhea, pain in the abdominal area (especially in the lower right side), flatulence, fever, headaches, nausea, malabsorption, malnutrition, loss of appetite and energy, and weight loss. Crohn's disease is sometimes misdiagnosed as appendicitis, as the pain often derives from the same location.
Ulcerative Colitis
Symptoms of ulcerative colitis include bloody diarrhea, cramps in the lower abdomen, and occasionally hard stools. Rectal examination may show fissures, hemorrhoids, fistulas, and abscesses. In either of the two disorders, the sufferer of IBD may show a fear or disgust of food in general, as the pain does not make eating an enjoyable endeavour (though it is unclear as to how diet is related to IBD).