Coughing and white sputum at night may be due to bronchial asthma.
The human airways can contract or diastole according to nerve regulation. At night, the nerves that make the airways contract are excited, and if bronchial asthma is present in the organism, it can further constrict the airways that are themselves narrow, causing symptoms such as chest tightness, coughing and coughing up sputum. If a patient has a cough and white sputum at night, they need to focus on the presence of bronchial asthma.