Hi. The patient who has undergone gastrectomy with total pancreatectomy for Cancer of pancreas can have such problems as the intestine is directly connected to the esophagus and there is a blind loop carrying the bile via the Y limb. First of all your Aunt should stop all the foods and beverages increasing this type of pain. I would advise for Endoscopy and barium studies to find out the cause of pain and rectify it surgically if warranted. Till then she can be kept on fluids only. She should walk around after feeds. Continue the medicines she is already on.