Hello, karmasonam69, You had gallbladder surgery three years ago and probably this was done through laparoscopic route and not open surgery. If the surgery was difficult due to location of the gallbladder or too much inflammation around , it is possible to develop some adhesions or scar tissue around that area. There is a part of the colon called the hepatic flexure that is close to the liver. If there is some kinking , gas can get trapped in that area and give you the bubbles. When you change your position the gas moves and you may get relief. Unless the problem is major you really don t need another surgery. Try to take simethacone containing pills that may help to break up the gas bubbles. Make sure you drink enough water also. You might consider getting an x-ray of your colon (Barium Enema) to see the shape of the colon. I wish you well.