Chest pain is a common symptom in emergency medicine and is usually caused by chest diseases. The severity of chest pain is not always exactly related to the cause of chest pain, for example, herpes zoster in the chest can produce severe chest pain, while chest pain in acute myocardial infarction is sometimes not very severe. Therefore, patients with chest pain should be carefully examined to find the cause of chest pain as much as possible. Emergency measures for severe chest pain: 1, suspected angina attack, immediate oxygen, rest, sublingual nitroglycerin. 2, chest pain caused by pleurisy or chest wall disease, you can use a wider abdominal belt to fix the chest wall at the painful place to reduce the degree of thoracic motion during breathing. 3, immediately go to the hospital to do electrocardiogram and X-ray examination to confirm the diagnosis. Treat for the cause.