Bronchial mucus plugs are formed by the concentration of mucus secreted in the bronchial tubes. Bronchial mucus plugs are relatively small and may disappear on their own, but if they are large or thick, they are difficult to disappear on their own. However, if the bronchial mucus plugs are more numerous or thicker, it is difficult for them to disappear on their own. If the bronchial mucus plugs are relatively small and the obstruction of the airway is not serious, the bronchial mucus plugs may disappear on their own or be discharged with the cough reflex in some of these patients. If the patient’s bronchial mucus plugs are more numerous or thicker, it is generally more difficult to discharge, then you can follow the doctor’s instructions to apply aminoglutethimide, carbocysteine and other phlegm treatment. When coughing and sputum are more serious, you should consult a doctor immediately and standardize the treatment under the doctor’s guidance. Meanwhile, drinking more water can dilute the mucus plugs, which will help expel the bronchial mucus plugs.