Objective:To observe the clinical effect of Runzao Zhiyang decoction on reliving itching and its correlation with cura-tive effect.Besides,to explore the evaluation mode of syndrome and symptom combination.Methods:According to 1∶1 criteria,240 cases were collected as the subjects.Using stratified random,positive drug parallel control,double blind double simulation,evaluate the antipruritic effect and symptom relief effect of Runzao Zhiyang decoction and the correlation of main symptoms and syndrome by observing the main symptom of skin pruritu...