Left chest pain can be caused by angina pectoris, intercostal neuralgia, shingles and so on. 1. Angina: myocardial hypoxia is the main cause of angina pectoris due to decreased blood flow to the myocardium. The main clinical manifestation of angina pectoris is episodic pain, which mostly manifests as chest pressure pain, and some patients only manifest chest tightness. 2. Intercostal neuralgia: Thoracic vertebral disc herniation, senile spondylolisthesis, rheumatoid arthritis, ankylosing spondylitis, thoracic spine tuberculosis and so on can lead to intercostal neuralgia. At the onset of intercostal neuralgia, chest or rib pain can be seen, and the pain is from back to front, which is stinging or burning pain. 3. Herpes zoster: If herpes zoster occurs in the skin of the left side of the chest, pain symptoms will also occur, in addition to pain, the skin at the pain will also appear in clusters of herpes. If the patient has left chest pain, it is best to go to the hospital in time, follow the doctor’s instructions for the appropriate drugs, surgery and other treatments.