Last year i went into the hospital for pnuemonia and when i came out i started having issues with my stomach hurting serverly. The pain is located in my upper abdomin right below my breast. It starts out feeling like I have just eaten a full meal and am full up when in fact i havent eaten anything at all. The pain then spreads through my stomach and ends up making me vomit and have diarreah. I have never had this feelin or this pain before i went into the hospital. What is it and why did it come on so suddenly. It occurs about on an avereage of once maybe twice a month, however it did occur three times in one month.