There are many diseases that cause persistent cough, such as the following: i. Cough variant asthma, which can present with a violent, persistent cough. If a patient is diagnosed with cough variant asthma through pulmonary function and other related tests, the treatment plan is the same as asthma treatment, which requires inhaled glucocorticoids, commonly used drugs include Symbicort or Sulforaphane, and also oral leukotriene modulators, such as Montelukast sodium, while avoiding If the patient is diagnosed with GERD, oral proton pump inhibitors and gastrointestinal motility drugs are required, commonly used drugs include omeprazole, Mosapride, etc.; Third, persistent dry cough caused by drugs, such as patients with a history of hypertension, oral captopril Dry cough occurs, at which time the relevant drugs need to be discontinued.