Intermittent chest pain may be caused by physiological factors such as mood swings, overwork, or angina pectoris, costochondritis and other diseases. 1. Physiological factors: If emotional fluctuations, overwork, long-term late night, alcohol abuse, may lead to transient insufficient blood supply to the myocardium, chest intermittent pain. If such a situation occurs for a short period of time, it is a normal phenomenon. 2. Angina pectoris: angina pectoris is caused by a decrease in myocardial blood flow, resulting in myocardial hypoxia. Patients mainly manifested as episodic pain, mostly crushing pain in the chest, located in the back of the sternum, can be radiated to the anterior region of the heart, upper limbs and other parts of the chest, and some patients only have chest tightness, manifested as intermittent pain in the chest. 3. Costal chondritis: the etiology of costal chondritis is not yet clear, it may be caused by viral infection, chronic strain of thoracic and rib joint ligaments, immune abnormalities and other factors. Patients may have chest pain, the nature of the pain is mostly dull pain, hidden pain, some patients manifested as intermittent chest pain. There are many causes of intermittent chest pain, and patients are advised to go to regular hospitals to find out the causes.