The following reasons are considered: first, there is obstructive apnea syndrome, which is a relatively common cause, mainly due to obesity or chronic rhinitis and glandular hyperplasia, or overgrowth of the suspensory; second, it is considered to be caused by bronchial asthma; third, it is related to bronchitis and pneumonia, often coughing, fever and other symptoms; fourth, caused by the heart, it is easy to appear when the coronary artery blood supply is insufficient, you need to go to the hospital to do routine blood, electrocardiogram, and also need to take a film examination.