An exploratory randomized controlled study of qianma Zhisou granule in the treatment of cough after infection

INTERVENTION: control group:Qianma Zhisou granule placebo;Treatment group:Qianma Zhisou granule; CONDITION: Cough after infection PRIMARY OUTCOME: Cough symptom score; SECONDARY OUTCOME: Quality of life evaluation of cough;Visual analogue scale (VAS);TCM syndrome score;Clinical effective rate;Cough relief and disappearance time; INCLUSION CRITERIA: ? It is consistent with the diagnosis of cough after infection by traditional Chinese and Western medicine; ? Course of disease = 3 weeks and < 8 weeks; ? Those aged = 18 and = 60; ? The subjects were informed and voluntarily signed the informed consent form.