The right side of the back rib cage has vague pain, which may be caused by the following reasons: 1. If you accidentally move heavy objects or local impact injuries, it may lead to local soft tissue contusions or lead to the possibility of rib fractures, which can be clearly diagnosed by going to the hospital to take local X-rays. 2. It may be a local inflammation of the rib cartilage, usually based on local aseptic inflammation, without clear trauma, and if the inflammation is severe, local swelling or even redness. The most common cause of intercostal neuralgia is herpes zoster in the back, which invades the intercostal nerve and causes pain.