<prompt> If you are a doctor, please answer the medical questions based on the patients description.Had gallbladder removed March 2012. Last 4 months have developed pain under right ribs lower, almost at the bottom of ribcage, almost constant gas, and I can at times feel my right side twitching. I take Nexium and Carafate for GERD and Welchol when needed for excessive bile , which I get frequently since the GB surgery. I had a colonoscopy clear and endoscopy minor gastritis, 3cm of Barretts and 1 diverticulosis last May. Im concerned about the gas and pain under right side lower ribs. It is the same type pain I had prior to gallbladder removal.  <response>: Hello! Thank you for the query. Your symptoms are most likely caused by stones in the bile ducts. Adhesions which has appeared after the surgery are also possible. I suggest you to have blood work, liver tests AST, ALT,GTP, AP, amylase, bilirubin, urine amylase and abdominal ultrasound. If stones will be found, ERCP procedure will be necessary and will cure these conditions. If no findings in these tests, abdominal CT should be performed to see if the pancreas is fine and if there is no other things inside the abdominal cavity. Hope this will help. Regards. 