hi. what s the character of the pain? if it is colicky, epigastric to right upper quadrant in location with radiation to the side, back and shoulder area, associated with food intake, yes, it could possibly be gallbladder colic, which may be due to gallstones or polyp in his gallbladder. other concerns in the area of complain, i.e. liver, bowel concerns, must also be ruled-out. 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 abdominal ultrasound and liver function tests, will probably be requested. medical (proper antibiotic treatment) and/or surgical (if gallstones, cholecystectomy) will be directed accordingly. hope this helps. good day!! ~dr.kaye