There are several reasons for patients to gasp for air during sleep as follows: 1. Consider respiratory diseases, such as chronic bronchitis, chronic bronchial dilatation, chronic obstructive pulmonary emphysema, chronic pulmonary heart disease, pulmonary hypertension and other reasons that lead to pulmonary decompensation, in which the arterial oxygen saturation is insufficient, at which time there will be a typical gasping for air during sleep. 2. Some cardiogenic diseases such as The patient will also have such a situation if he has sleep apnea syndrome or excessive obesity.