The symptoms of Crohn’s disease can change from person to person. However, they usually involve stomach pain and frequent restroom visits. Diarrhea, feeling tired, losing weight, and possible fever are common.In more serious cases, Crohn’s can cause additional problems. These might include fistulas, which are abnormal tunnels between body parts. Strictures, ulcers, malnutrition, anemia, and a higher chance of colon cancer are also risks.