Coughing after waking up from sleep and not coughing normally may be related to dry indoor air, poor circulation, etc. It may also be related to chronic bronchitis, chronic obstructive pulmonary disease, cough variant asthma and other diseases. 1. When the indoor air is not circulated, or the indoor air is too dry, the respiratory tract is dry during sleep, and the excitability of the respiratory center is increased after waking up in the morning, which can be manifested as coughing in the morning and not coughing usually. 2. Chronic bronchitis, chronic obstructive pulmonary disease: at night the bronchial tubes due to the role of inflammatory factors can produce a large amount of sputum, secretions can accumulate in the airways at night, the respiratory center excitability increases in the morning, phlegm stimulation caused by coughing aggravation. 3. Cough variant asthma: If the temperature of the outside air changes relative to the temperature of the air during sleep, it may lead to cold stimulation of the airway and coughing, but it is not usually obvious. Wake up coughing usually not cough, may also be seen in chronic laryngitis, allergic cough and many other diseases, if the symptoms are serious, it is recommended to consult a doctor in a timely manner, to clarify the cause of the disease, standardized treatment under the guidance of the doctor.