Pain inside the ribs of the right chest can be seen in the following diseases: a. Pneumonia, pneumonia on the right side will cause chest pain related to breathing if it is close to the pleura, the chest pain will increase when the patient inhales deeply, coughs and turns the position, and the chest pain decreases or disappears when holding the breath, it is recommended to do chest X-ray or lung CT examination to clarify the diagnosis. Second, pleural effusion, when a small amount of pleural effusion, there will be fibrin exudation between the dirty pleura and the wall pleura, and the two layers of pleura rubbing against each other will produce pain, it is recommended to do chest X-ray, lung CT and chest ultrasound examination to make a clear diagnosis. Third, pneumothorax, pneumothorax patients often appear sudden chest pain, chest tightness and shortness of breath are often related to strenuous exercise and violent coughing, it is recommended to do chest X-ray or lung CT examination to make a clear diagnosis. Pulmonary embolism is a rare disease, which is caused by thrombus or other emboli blocking the pulmonary artery, causing chest pain and chest tightness and shortness of breath, and patients may also have lower extremity thrombosis, it is recommended to do pulmonary artery CTA, D-dimer and lower extremity vascular ultrasound to make a clear diagnosis.