A stabbing pain below the left rib cage, also called chest pain, is commonly associated with the following types of diseases: 1. Diseases of the circulatory system, most commonly coronary artery disease and angina pectoris, manifested as a feeling of pressure and tightness in the precordial area and behind the sternum after activity and exertion, relieved after rest, and not too compatible with the above symptoms. 2. Diseases of the respiratory system, pleurisy, pneumonia, tuberculosis, lung cancer, etc. are common causes. 3, Diseases of the digestive system, such as reflux esophagitis, and symptoms outside the esophagus can also cause the above symptoms.4. Diseases of the chest wall, such as costochondritis, costal neuritis, or herpes zoster, are more consistent with the above conditions. If localized with pressure pain, intercostal neuralgia needs to be focused on.