Normal man left chest pain, may be related to chest trauma, may also be due to heart-related diseases, intercostal neuralgia and other causes. 1. Chest trauma: commonly seen in car accidents, due to accidents resulting in car accidents, just the chest by external impact, is likely to lead to local soft tissue damage or bone fracture, it may cause left chest pain. 2. Heart disease: commonly seen in angina pectoris, heart attack and other diseases, may lead to insufficient blood supply to the patient’s heart muscle, which may cause left chest pain, may also be accompanied by panic, shortness of breath and other symptoms. 3. Intercostal neuralgia: usually caused by intercostal nerve compression, inflammation and other reasons, when intercostal neuralgia attack, may cause left chest pain, especially in sneezing, coughing pain symptoms increased significantly. Men with left chest pain, may also be related to other factors, it is recommended to go to the regular hospital as soon as possible, through the improvement of relevant examinations, diagnosis of the causative factors, by the doctor’s guidance for treatment.