The main pathological basis of cough in patients with chronic bronchitis is the chronic inflammatory reaction of the bronchial mucosa due to various causes. It is mainly due to the invasion of pathogens such as viruses, bacteria, mycoplasma, chlamydia, rickettsia, or stimulation by fumes, cold air, dust, etc., which causes significant congestion, edema and exudation of inflammatory substances from the bronchial mucosa. In most cases, the coughing and coughing symptoms occur because the acute bronchitis is not thoroughly treated in time and the inflammation is prolonged, resulting in chronic and prolonged damage to the mucous membrane, which causes the glands to secrete excessively. Clinical treatment is all symptomatic and etiological.