Hey, Nickie, I'll try to help here. IBS and Crohn's are two totally different animals. IBS is driven by stress and anxiety (made worse I mean); symptoms are chronic constipation or constipation alternating with diarrhea, abdominal cramping and bloating. Diarrhea most usually presents when the person is under a lot of stress or is worrying excessively. It can be so bad time from work is lost due to the time on the toilet! Or it can just be a nuisance. It can simply be bloating/gas. It's different for everyone.
Crohn's OMG. It's an autoimmune disorder (meaning the body is actually attacking it's own tissue), like rheumatoid arthritis and lupus among many different illnesses. Usually there is another autoimmune disorder present with Crohn's. Symptoms are severe and debilitating; severe, dehydrating diarrhea, severe abdominal pain, mostly in the lower right side, ulcers in the intestinal walls, chronic intestinal/rectal bleeding that causes anemia, malabsorption of nutrients causing malnourishment. It can inhibit growth in children. It is a very serious disease, and is really nothing like IBS. I doubt your friend has that, a doctor would have known the difference. Hope that helps!