crohns disease is an inflammatory bowel disease. also autoimmune. to sum up some symptoms there is having to go to the bathroom a lot, stomach pains, anemia, and malnutrition but here is a detailed reference:
CCFA.org: About Crohn's Disease and remicade is an infusion that people get every 6-8 weeks. it doesn't work for everyone because everyone's body reacts differently to medicines. here is a site about it.
REMICADE® (infliximab) Biologic Treatment
hope i helped!