Atopic dermatitis, also known as atopic eczema, atopic dermatitis, hereditary atopic dermatitis, and hereditary allergic eczema, is a chronic inflammatory skin disease characterized by intense itching, dry skin, and rashes. The disease is associated with a history of specific allergies in the patient himself or in his family, and such patients are also prone to allergic rhinitis, asthma, urticaria, eczema and other diseases. Allergens that often cause atopic dermatitis: First, exogenous, such as milk, eggs and other foods; dust, pollen and other inhalants; chemicals, medicines and other contacts, as well as bacterial and viral infections. The second is endogenous, such as bright light, cold, dry, hot and humid climate, environmental changes; physical fatigue, mental overstress and other factors. Its pathogenesis is mainly related to abnormalities in immune function. After a lot of research, it is found that patients have enhanced activation of T-lymphocytes; imbalance of TH1/TH2 in helper T-lymphocytes; increased production of inflammatory cytokines; increased level of serum IgE; and increased eosinophils in peripheral blood. Chinese medicine believes that the occurrence and aggravation of this disease is mostly related to the dysfunction of the spleen and stomach, with spleen deficiency and dampness stagnation as the root of this disease, and wind-dampness and heat as the symptoms of this disease. What are the characteristics of atopic dermatitis? The clinical manifestations of atopic dermatitis are skin erythema, scaling, exudation, dry skin, mossy changes, and intense itching. The disease mostly starts in infancy and childhood, and there are lifelong non-healing, and the characteristics of the skin lesions are also characterized by different ages, and clinically divided into three phases, i.e., infancy, childhood, youth and adulthood. Currently, Williams’ criteria are used to diagnose atopic dermatitis, i.e., the patient must have a history of itchy skin, plus three or more of the following. 1, History of flexural skin involvement. 2, Personal history of asthma or chilblain fever. 3, History of generalized dry skin. 4, Visible eczema on the flexor side. 5, Onset before 2 years of age.