Hidden pain inside the right rib cage may be caused by trauma, pneumonia, pleurisy, digestive system diseases, costochondritis and so on. 1. Trauma: If the patient suffers from trauma to the right rib cage, resulting in a fracture of the right rib cage or damage to the local soft tissues, etc., it will cause the patient to have vague pain inside the right rib cage. 2. Massive pneumonia: patients with massive pneumonia may have solid changes in lung tissues, symptoms of chest tightness, chest pain, dyspnea, high fever, and may have involved pain, which is manifested as vague pain inside the right rib cage. 3. Pleurisy: various causes such as inflammation, trauma, tumor and other causes of pleural inflammation, pleural fibrous hyperplasia, while inflammation produces strong and persistent stimulation of the pleura, which leads to vague pain in the right rib cage. 4. Digestive system diseases: such as hepatitis, cholelithiasis, cirrhosis, etc., all kinds of inflammatory stimulation, nerve irritation, tissue compression and other reasons, will lead to discomfort in the right upper abdomen, which can be manifested as vague pain in the right rib cage. 5. Costal chondritis: mostly caused by non-infectious factors, such as due to long-term strain, trauma, endocrine factors, etc., manifested as pain and pressure pain in the rib area, caused by infectious factors can also appear as local skin redness, swelling, heat and pain. The pain may radiate to the back of the shoulder, armpit, cervical and thoracic area, and may be aggravated by deep breathing, activity or exertion. Other conditions can also lead to vague pain inside the patient’s right rib cage, it is recommended that the patient seek medical examination in time to clarify the cause of the disease, and under the guidance of the doctor to carry out the appropriate treatment.