Clinical study of Compound Yinhualishi Granules in treating eczema

INTERVENTION: experimental group:Compound Yinhualishi granules+Cetirizine+Single cream ;control group:Placebo + Cetirizine + Single cream; CONDITION: eczema PRIMARY OUTCOME: Effective rate; SECONDARY OUTCOME: Visual analog scale of itching degree;Skin hydration;Epidermal water loss rate;Texture parameters;Regional renal blood flow; INCLUSION CRITERIA: 1. Aged 18‐65 years (including 18 and 65); 2. Meet the diagnostic standards of Western medicine and Chinese medicine for eczema; 3. Previous history of acute and subacute eczema; 4. All of them were primary eczema, which was not related to occupational factors; 5. Be informed of the study and sign the informed consent.