The flow of the contents through the intestine ceases When Crohn’s disease narrows the small intestine to the point of obstruction,. Sometimes, the obstruction can be caused suddenly by poorly-digestible fruit or vegetables that plug the already-narrowed segment of the intestine. Digesting food, fluid and gas from the stomach and the small intestine cannot pass into the colon when the intestine is obstructed,. The symptoms of small intestinal obstruction then appear, including severe abdominal cramps, nausea, vomiting, and abdominal distention. Obstruction of the small intestine is much more likely since the small intestine is much narrower than the colon to begin with.