The left side of the rib cage below a burst of stabbing pain is also called chest pain, common are the following types of diseases: 1, circulatory diseases, the most common is coronary heart disease, angina pectoris, manifested as activity, exertion, precordial area, behind the sternum pressure, tightness, after resting to relieve the symptoms, and the above symptoms are not too consistent. 2, respiratory diseases, pleurisy, pneumonia, tuberculosis, lung cancer and so on is a common cause. 3, Diseases of the digestive system, such as reflux esophagitis, symptoms outside the esophagus can also cause the above symptoms.4. Diseases of the chest wall, such as costochondritis, costal neuritis or herpes zoster, and the above situation is more consistent. If there is localized pressure pain, intercostal neuralgia should be considered.