Hi, I Have A Distended Abdomen And Throbbing Intestines In

Hi, I have a distended abdomen and throbbing intestines in left quadrant, now also have leg pain when lying down, feels like a headache in the legs. No Gastro Dr has been able to diagnois me, CT scans show nothing, so they say there is nothing they can do. I have had this for many years. Not IBS, I would like to have an answer so I can enjoy life, I am 80 yrs old, on NO medication.