I know this is really bad but sometimes I purge once I have had a meal. I havnt done it for a really long time but Ive been under alot of stress so I sometimes have bulimic episodes when Im under pressure. Anyway, I did today and when I purged, my chest really hurt. I had this massive pressure on my sternum from the inside pushing out, It felt like my thorasic cavity was going to explode. Obviously I stoped, but I would like to know why it hurt so much and if I caused any damage to myself. I fell ok now but I could hardly stand the pain I felt when I threw up. This has never happened before!