Clinical trial of Bu Shen Yi Qi Fang on treating atopic dermatitis

INTERVENTION: B:Imitation of Bu Shen Yi Qi Fang + Desloratadine tablet;A:Bu Shen Yi Qi Fang + Desloratadine tablet; CONDITION: Atopic dermatitis PRIMARY OUTCOME: SCORAD; SECONDARY OUTCOME: Traditional Chinese symptom scores, VAS, DLQI, nights of waken, days without itches, Quality of life; INCLUSION CRITERIA: 1.Aged 18 to 70 years old, male or female; 2.Able and willing to provide signed informed consent; 3.Patients with low moderate atopic dermatitis, SCORAD<=50; 4.Qi deficiency syndrome, kidney qi and yang deficiency syndromeaccording to Traditional Chinese medical Differentiation.