If you feel dyspnea, shortness of breath, and suffocating awake during sleep, it may belong to long-term sleep apnea syndrome, or poor cardiac function. In general, heart failure may be aggravated by suffocating awakening during sleep, or sudden dyspnea after lying down, which will improve after sitting up, especially in people with advanced heart failure. If a similar situation occurs in normal people, it may be necessary to further improve the electrocardiogram, cardiac ultrasound and other tests to exclude organic heart disease changes. If no pathological changes in heart or lung disease are found through close examination, it may generally be due to sleep apnea syndrome, etc., and can be observed by monitoring sleep to see if there are pathological changes.