The pain inside the right lower rib cage is usually caused by right intercostal neuralgia, right osteoarthritis, herpes zoster, right lung pneumonia, acute angina, aortic coarctation, tension pneumothorax, etc. If the pain is severe and not relieved, you can first take oral antipyretic and analgesic drugs, such as Fenbid, Ibuprofen, etc. at home by yourself. If the pain is still not relieved, take 2-4 capsules of nitroglycerin under the tongue. Observe whether the pain is relieved after 15 minutes. If the pain is still not relieved, you need to go to the hospital immediately. If you have difficulty moving on your own, or if you have chest tightness or shortness of breath after moving, you need to call 120 and go to the hospital. To go to the hospital, you need to check the blood routine, electrocardiogram, emergency test for myocardial infarction triad, and if available, you can test the myocardial enzyme spectrum and do chest radiography and lung CT for clear diagnosis.