I was told I have this also. I have severe constipation then episodes of severe cramping, diarrhea, and vomiting. It’s some of the worst pain ever. It feels like I can actually feel the feces move thru the colon until I have a bowel movement. The episodes generally last about 4 hours then I sleep the entire day. I had an “episode” on an airplane once and you talk about humiliating. The flight attendant busted the door open because he wanted me to come out of the bathroom and I kept telling him I couldn’t and he kept saying I had to and I’m sitting in the toilet with diarrhea and vomiting in the sink at the same time. The pilot then told my husband they were going to make an emergency landing and my husband refused and tried to explain my situation. So then the pilot said they would get an ambulance ready at our destination and again my husband refused and explained it’s a chronic condition and it will pass. I was embarrassed and my husband could have just died, once we landed, my husband looked out the window and there sat an ambulance. I don’t know if it was coincidence or what but thank goodness they let me off that plane. I’m terrified to fly now because of this incident.