Allergic dermatitis is a relatively common skin disease. For a woman who loves beauty, allergic dermatitis not only damages her health, but also affects the beauty of her skin. And to really get rid of allergic dermatitis, preventing recurrence is the key. The following are some ways to prevent the recurrence of allergic dermatitis: 1, reduce the triggering aggravating factors and stimulating factors such as mechanical factors scratching, friction; physical and chemical factors hot water washing, high temperature, low humidity, irritating drugs; biological factors plant and animal, microbial infection; mental tension or emotional depression or digestive disorders. 2, away from allergic factors, this is the most fundamental way to prevent atopic dermatitis. As far as possible to reduce environmental allergens, such as inhalation allergens all substances that can be inhaled through the respiratory tract are potential allergens, including dust, dust mites, cotton wool, pollen spring and summer and autumn, animal hair, fungi, insects and smoke, etc.. Food allergens are allergens that cause allergic reactions through ingestion, including fish, shrimp, crab, beef and lamb, eggs, milk, peanuts, soybeans and nuts. Contact allergens are allergens that cause allergic reactions through contact with skin or mucous membranes, including clothing, dyes, cosmetics, jewelry, topical medications, lacquers, organic solvents, hair dyes, and disinfectants. In order to create a healthy and hygienic environment, often maintain indoor hygiene, open windows and ventilation, maintain the appropriate temperature and humidity, do not use disinfectants, etc.; in the spring, try to let children less exposure to pollen; avoid direct sunlight in the summer; do not keep pets at home, especially not indoors; use less carpets, diligent vacuuming; do not use electric blankets; avoid irritating cosmetics, etc. 3, care for the skin, scientific and reasonable bathing, choose pH-neutral, non-irritating soap; not indiscriminate use of skin care products, underwear to choose soft cotton fabrics, should not wear wool, chemical fiber fabrics, these fabrics are rough, and irritating to the skin, easy to trigger dermatitis, eczema. 4, regular life, calm mood, exercise to improve the body’s immune function and resistance to disease.