I have been vomiting a lot lately. I've noticed if I stay out in the heat for an extended period of time, I vomit (it takes about a half an hour of heat and then the vomiting comences). Also, when I eat any greasy food, I vomit. And then there are the many times it seems to happen for no reason. I also have a problem with what seems to be the muscles at the end of my colon. It seems as if it no longer works to push waste out, if that makes sense. And because of that, everything gets stuck at the turn before my rectum (I think that is the term for the end segment of your colon). It's not the same as constipation because it is not hard or wide, it just won't move out until my sigmoid colon is full (which will probably cause my problems in the future). I went to "google academy" and looked this up and it came back with sphincter paralysis. Have you heard of that? If so, can you let me know what you know, please and thank you. Has this stuff happened to anyone else?