Pain inside the right rib is commonly caused by the following: first, right rib fracture and peri-rib soft tissue injury, the patient will show severe pain inside the right rib with local swelling, breathing and activity will be seriously affected, there is obvious local tenderness, and the skin temperature will be significantly elevated. X-ray or 3D CT can reveal fracture and displacement of the right rib, which can gradually heal after early fixation. Second, bronchopneumonia or pleurisy on the right side can also lead to pain inside the right rib cage, along with restricted breathing and activity, and the patient can have clinical symptoms such as coughing and sputum, and can even cause generalized fever. Blood tests and CT scan of the lungs can reveal an increase in white blood cells and the presence of inflammation in the lungs, and timely anti-infection treatment can improve clinical symptoms. The presence of pain inside the right rib cage requires early diagnosis and early treatment.