On 2-26-14 I had rny gastric bypass. 2 days after going home from hospital I had severe pain and burning in abdomen went to doctors and they said I ripped a muscle in abodomen gave more pain meds and belt to wear. couldn't take pain meds as I would get very nauseated.as long as I don't move pain isn't to bad but the minute you get on your feet and start moving it was intense, I have ripped muscles in my knees several times but pain has never been this bad, was wondering if anyone else has had this problem and if so how long it last? Thank You for any response