The sudden stabbing pain in the lower left side of the chest varies according to the patient’s age and other conditions, and may be organic or functional. The following aspects can be considered: i. If the patient is older, first rule out whether the patient has coronary artery disease. Second, if the patient’s chest pain is related to respiratory movements, you should consider whether the patient has pleurisy and other conditions. Third, if the patient is a young patient and has a tingling sensation in the chest at rest, which does not affect daily life, you can consider whether it is a cardiovascular neurosis caused by factors such as psychological stress. Fourth, if the patient has fever and wasting in addition to stabbing pain in the lower left side of the chest, it is necessary to exclude tumors and tuberculosis in the chest. Fifth, there are chest wall diseases, such as intercostal neuritis, herpes zoster, etc., which may also appear as sudden stabbing pain in the chest. In short, when the chest suddenly tingles, the diagnosis should be clarified through relevant examinations in a timely manner. If the patient is relatively young and all kinds of tests are normal, it cannot be excluded that the patient has cardiovascular neuropathy.