Eczema is an inflammatory skin reaction caused by a variety of internal and external factors, accompanied by intense itching, often recurring, the cause of eczema is not easy to query, each eczema patients are not the same triggers, even the same patient at different times, the triggers are not the same. Therefore, the principle of eczema prevention and treatment is symptomatic, generally have the following precautions: 1, diet and living, regular life, avoid mental tension, maintain an optimistic and cheerful attitude to the world; appropriate physical exercise, work and rest; 2, adjust the digestive endocrine function, such as long-term constipation, ulcerative colitis, diabetes, etc., must be actively treated; according to seasonal changes in skin care, anti-blowing sun protection against rain anti-freeze. 3, the acute phase of eczema must avoid sensitive foods such as seafood, fish, shrimp, crab, milk, eggs, mango, pineapple, lychee, longan, etc., and avoid stimulating beverages such as wine, coffee, strong tea, etc. Eczema on the hands, feet, calves and other places should also pay attention to quit smoking. 4, pay attention to personal hygiene, clothing should be loose and comfortable, try to choose cotton products, especially for those allergic to silk and wool, should avoid wearing silk, woolen fabrics, leather clothing, and even down jackets. 5, keep the skin clean and moist, avoid all possible irritants, do not scratch and friction, hot water, alkaline soap wash, use irritating topical drugs. 6, for infant eczema, do not contact with patients with herpes simplex to avoid causing herpetic eczema; in the acute period should be suspended a variety of preventive injections. 7, eczema patients are prone to drug allergies, so the use of a new topical drug, you must start with a low concentration, gradually increase the concentration, each application needs to be thin and uniform, while closely observing the changes in the rash and the reaction to the drug, if there is discomfort, please seek medical advice; a topical drug treatment is effective, do not frequently change the variety and dose of drugs. 8, the reasonable use of hormonal creams, fluorine-containing potent corticosteroid preparations, such as de-inflammatory pine, skin easy, betamethasone, etc. should not be long-term or large area topical use, so as not to cause side effects. 9, for calf eczema accompanied by varicose veins in the lower extremities, the lower extremities should usually be elevated or wrapped with elastic bandages to improve blood circulation in the lower extremities; if possible, after the local rash improves, try to strive for surgical treatment of varicose veins. 10, for eczema in the anal and external genital area, attention should be paid to actively seek and treat possible primary factors, such as hemorrhoids, anal fistula, vaginitis, etc.