If you feel a vague pain in the chest when you breathe deeply, it is mainly considered to be caused by chronic inflammation of the respiratory tract and lungs. In case of rib fracture, intercostal muscle injury, intercostal neuralgia, pleurisy, pleural tumor, it is usually necessary to go to the hospital for chest X-ray examination first, and if it is caused by bronchitis, pneumonia, pleurisy, it needs to be treated with effective antibacterial drugs. If it is caused by trauma, it needs to be fixed with a chest strap to reduce deep breathing, and oral analgesics can be taken. If there is intercostal neuritis, nerve-nourishing drugs are needed, and drugs such as ibuprofen and diclofenac sodium can be used when the pain is more severe. In this case, it is also necessary to pay attention to rest and diet to avoid causing colds and coughs.