One factor involved in your child's Crohn's disease is producing too much of a protein called TNF. This overproduction of TNF can cause your child's gastrointestinal tract to become inflamed, which can trigger Crohn’s symptoms.
Crohn's symptoms can include abdominal pain/cramping and diarrhea, and are the result of inflammation in the gastrointestinal (GI) tract. Complications (different types of bowel injury) can also develop if the inflammation is persistent.