hi. noted history of gallbladder condition. is it secondary to an obstruction like a gallstone or polyp? these are the common pathologies that could cause your epigastric and right upper quadrant abdominal pain, with radiation to the flank area and back. it is best if you consult with a doctor, preferably a gastroenterologist or a general surgeon, for physical examination and clinical evaluation. diagnostics (such as ultrasound, liver function tests, bilirubins, etc.) and management (medical and/or surgical if indications are found) will be directed accordingly. if it is indeed of gallstone in origin, definitive treatment is cholecystectomy or surgical removal of the gallbladder, which could be done laparoscopically (goldstandard) or thru open technique. low fat diet is also recommended. hope this helps. good day!! ~dr.kaye