The symptoms of chest pain after walking fast have more causes, the most common cause is caused by coronary heart disease. Patients with coronary artery stenosis and inadequate blood supply to the myocardium may experience angina pectoris as a result of strenuous exercise, exertion or emotional stress. Patients often experience pain in the precordial region, which can be relieved by rest or oral nitroglycerin. Patients with costochondritis can also experience chest pain. Most cases of costochondritis are non-specific, and patients with costochondritis can experience chest pain, usually between the 2nd and 4th ribs next to the sternum, which can be aggravated by deep breathing and coughing or by strenuous activity, and this condition tends to recur. In addition, chest pain may also be caused by pleurisy, intercostal neuritis or herpes zoster, etc. In this case, first pay attention to rest, avoid straining and pay attention to cold and warmth. It is also necessary to go to the hospital to improve the relevant examination to clarify the diagnosis and carry out targeted treatment according to the cause.