The causes of eczema are complex, such as living environment, high temperature, climate change, and food can affect the occurrence of eczema. External stimuli such as sunlight, cold, dryness, heat, hot water, and various animal hides, plants, cosmetics, soaps, and artificial fibers can trigger it. It is a delayed metabolic reaction caused by complex internal and external factors. It is mainly based on medical history, rash pattern and disease duration. The general eczema lesions are polymorphic, with erythema, papules, and papules predominantly, with a distinct central rash that gradually spreads out to the periphery, with unclear boundaries, diffuse, and a tendency to exude, or in chronic cases, infiltrative hypertrophy. The course of the disease is irregular, with recurrent episodes and intense itching. Eczema has a complex etiology and is prone to recurrence after treatment, making it difficult to cure. The main thing is to remove allergens and do allergen testing. 1, general prevention and control principles. Look for possible triggers, such as the environment, diet, milk, pollen, insects. Remove the triggers. 2, according to the skin lesions to choose the appropriate formulations and drugs. Acute phase, 3% boric acid, wet compresses, and furnace glycolic lotion for astringency and protection. Appropriate glucocorticoid cream. Add antibiotic preparations for secondary infection.