Question: I have simultaneous diarrhea and vomiting. No doctor has been able to explain or diagnose this.

Response to query for more data: I have been experiencing these episodes for about a year now. They don't occur continuously, but are unpredictable, as far as I've been able to determine. I may go a month without any episodes and then have two in one week. I've had four this year already. I've probably misled by calling it diarrhea and vomiting. The first occurrence was during a bout of diarrhea; since then it is sometimes associated w/diarrhea, others with just a loose stool. I am always on the toilet when I feel the urge to vomit; there is no preceding nausea. It has twice immediately followed eating a meal, both times breakfast (once before the food allergy diagnoses, included a cheese omelet and an English muffin, but no meat; second after the food allergies were detected, was scrambled eggs, bacon and diced potatoes). Other times, it may be hours after eating. There has been no mucus, blood or other problems with stools and a recent occult stool test was negative. I haven't noticed a relationship to stress or anxiety, even when attending to this as a possible contributor.