Chest pain occurs at night, generally speaking, the common causes are mainly the following: i. Lung infection, the patient’s lungs contain a large amount of phlegm due to the accumulation of phlegm in the trachea and bronchi. At night, the patient will suffer from ischemia and hypoxia after sleep, and the symptoms of chest pain will appear. At this time, patients need to strengthen the anti-infection treatment of the lungs, take oral cough suppressant and compound licorice tablets to promote the discharge of phlegm in the trachea, reduce the ischemia and hypoxia of the body, and relieve the symptoms of chest pain. Second, patients with coronary atherosclerotic heart disease, if the heart continues to contract during sleep at night, it will cause myocardial ischemia and hypoxia, resulting in pain in the chest. At this time, patients need to improve the coronary angiography as soon as possible to clarify the severity of the narrowing of the heart vessels. If necessary, cardiac stent implantation can be performed to expand the heart vessels and reduce the pain in the chest.