The phenomenon of falling asleep and waking up with breathlessness may be sleep apnea syndrome, or it may be other systemic diseases, such as heart disease and lung disease. Once the symptom of waking up while sleeping occurs, it is recommended to go to the hospital as soon as possible. 1. Sleep apnea syndrome: due to excessive obesity or poor sleep posture and lead to tongue falling back to block the airway channel, hindering the smooth flow of breathing, may appear to fall asleep and breathe not up to wake up phenomenon. In children, tonsillar hypertrophy and adenoid hypertrophy are the most common causes. It is recommended to go to the ear, nose and throat department of the hospital to further find the cause and treatment. 2. Other systemic diseases: (1) heart disease: cardiac insufficiency, myocardial ischemia patients, especially patients with left heart failure, often due to cause pulmonary stasis, easy to appear shortness of breath, dyspnea and suffocation. (2) lung disease: bronchial asthma: due to the night vagus nerve excitability enhancement caused by the bronchial tubes in the relative contraction of the state, which is easy to lead to airflow limitation, which will fall asleep to breathe not up to wake up the phenomenon of suffocation. Once you fall asleep and can’t breathe, it is recommended that you go to the relevant department of the hospital to find out the cause of the disease and actively cooperate with the doctor’s treatment.