Long-term smoking left chest pain, need to be alert to cardiovascular disease, lung disease may be, it is recommended to seek medical attention, clear cause, follow the doctor’s instructions for symptomatic treatment, and quit smoking. Tobacco contains many harmful substances, some substances have carcinogenic effect, long-term smoking will damage the endothelial damage, causing atherosclerosis, which in turn triggered myocardial ischemia, resulting in chest pain and angina pectoris. Long-term smoking may cause lung cancer, tumor stimulation of lung tissue, pleura, etc., triggering pain. It is recommended to consult a doctor, under the guidance of a professional doctor, improve the electrocardiogram, heart attack three, cardiac ultrasound, chest CT, blood lipids and other tests, and if necessary, feasible coronary angiography, to clarify the existence of vascular stenosis. Smoking is harmful to your health, so it is recommended to quit smoking and maintain a healthy lifestyle.