In addition to self-induced factors, environmental factors are often important contributing and aggravating factors to eczema. Two years ago, I organized the development of the “China Eczema Treatment Guidelines”, which patients can search online. When I preach the guide, I put forward five tips for environmental factors: clothing: cotton, light-colored, loose, wash and change frequently. Food: Observe what you eat after the rash and itching worsens, my patients I will give them a food diary, to find food allergens to help a lot, do not easily believe in allergen testing, allergen testing is a reference, not a substitute for patient experience. Live: Try not to live in the basement (humid), no pets, no carpets, not too many flowers, bedding as cotton as possible, rooms should be often ventilated. Walk: observe what environment will aggravate your condition, some places should pay extra attention, such as: botanical gardens (more pollen), zoos (more animal hair), home improvement market (more organic volatile substances), etc. Washing: bathing but more, but less, warm water, remember to wash immediately after the external use of moisturizing milk, to maintain the moisture and integrity of the skin is very important to make a habit. The above five key words can not cover all the precautions, but has covered most of them.