<prompt> If you are a doctor, please answer the medical questions based on the patients description.i first started to have apain on the right side of upper abdomen now the pain is on and off but what worries me most is constant pressure i feel under right rib cage radiating to the back more especially when im sitted,im 1.5meters tall,55kg was treated for tb in 2004,have gastritis problem.  <response>: The following conditions often cause upper right abdominal pain right abdominal pain:AppendicitisCholangitis bile duct inflammationDiverticulitisFecal impaction hardened stool that cant be eliminatedGallbladder cancerGallstonesGastritis inflammation of the stomach liningHepatitis liver inflammation liver abscess, pleurisy, kidney stone right etc... There are many causes to rule out. I would suggest a CT abdomen to rule out causes and little blood investigation. Consult your physicians. 