Hidden pain above the left chest in men may be caused by cardiac neurosis, intercostal neuritis, myocardial infarction and other diseases. 1. Cardiac neurosis: the cause of this disease is not yet clear, may be related to mental stress, introversion, heredity, mental stimulation and other factors, resulting in cardiovascular dysfunction, the patient will have pain in the precordial area, dyspnea, insomnia, tinnitus and other symptoms, which can be manifested as a vague pain in the upper left chest. 2. Intercostal neuritis: the occurrence of this disease is related to herpes zoster, nerve compression, thoracic spine injury, ankylosing spondylitis, etc. It can be triggered by fatigue, overexertion, cold, etc., which will cause sensory abnormality and pain in the area of the distribution of intercostal nerves, and so on, so some of the patients will have vague pain over the left chest. 3. Myocardial infarction: the common cause of this disease is coronary atherosclerosis, which is related to insufficient oxygen supply to the myocardium, decreased blood perfusion to the heart, and increased myocardial oxygen consumption. Patients will experience symptoms such as palpitations (rapid heartbeat, often accompanied by panic), chest discomfort, and fatigue, which can manifest as a vague pain above the left chest. When a man experiences vague pain above the left chest, he should go to the hospital in time to clarify the specific cause.