What cause right side rib pain?

Costochondriitis: Costochondritis is an inflammation of the junctions where the upper ribs join with the cartilage that holds them to the breastbone, or sternum. The condition causes localized chest pain that you can reproduce by pushing on the cartilage in the front of your ribcage.

Several possibilitie: Trauma, bruise, exercise, coughing, stress fracture, costochondritis, can all cause pain that should get better over several weeks. Shingles, other infections, and rheumatic diseases can cause pain that may be more chronic. Ask your provider. Rib films are rarely helpful. Cancer and myeloma can cause pain of course, but you would probably already know. There are other benign bone tumors etc.