The causes of bronchitis coughing at night when lying down include reflux of secretions in the trachea, increased vagal excitability, etc. Active treatment is needed to improve the symptoms. When lying down, the secretions in the trachea will reflux, and the refluxed secretions will stimulate the pharynx, which will cause coughing; at night, due to the increase of vagus nerve excitability, it will stimulate the increase of tracheal secretions and the contraction of the tracheal smooth muscle, which will also cause coughing symptoms under the combined effect. Therefore, it is recommended to actively cooperate with doctors to treat bronchitis, combined with bacterial infection can take antibiotics such as doxycycline, penicillin, erythromycin, erythromycin, etc. to control inflammation, the drug needs to be used in accordance with the doctor’s instructions, the emergence of adverse reactions to timely medical attention, drug allergy is prohibited.