Symptoms depend on what part of the gastrointestinal tract is affected. Symptoms range from mild to severe, and can come and go with periods of flare-ups.

The main symptoms of Crohn's disease are:

Crampy abdominal (belly area) pain
Fever
Fatigue
Loss of appetite
Pain with passing stool (tenesmus)
Persistent, watery diarrhea
Weight loss
Other symptoms may include:

Constipation
Eye inflammation
Fistulas (usually around the rectal area, may cause draining of pus, mucus, or stools)
Joint pain and swelling
Mouth ulcers
Rectal bleeding and bloody stools
Skin lumps or sores (ulcers)
Swollen gums

Signs & Symptoms