Chest pain in the morning is mainly considered to have three possibilities: First, physiological factors, when sleeping at night in the side-lying position or prone position, due to the chest muscle pressure, resulting in the accumulation of local metabolites, after getting up in the morning there can be soreness and pain in the chest; Second, cardiovascular diseases such as coronary artery disease, at night due to the excitation of the vagus nerve, so there can be no obvious clinical symptoms, but due to the morning difference in skin temperature temperature is greater. Larger, when cold or heat can cause sympathetic nerve excitation, resulting in coronary artery contraction, myocardial ischemia, manifested in the anterior thoracic area pain and discomfort, and can be radiated to the back, sublingual nitroglycerin can be relieved; third, reflux esophagitis, in the morning due to changes in position can lead to the esophagus in the content of gastric acid is suddenly reduced to stimulate the mucosa of the esophagus appeared after the sternum burning pain, and can be accompanied by acid reflux and belching discomfort.