因日光或其他光线照射而在皮肤上引起的各种病变或使之加剧的统称为光线性皮肤病,包括通常所指的光毒性皮肤病和光敏性(光变态反应性)皮肤病。出门打伞、戴草帽或穿长袖衣服等“遮盖”方式是最好的避光保护皮肤的方法;其次可以选择合适的防晒护肤霜,使皮肤避免接受过强或过多的紫外线辐射。现在市面上的防晒化妆品具有美白防晒、抗皱防晒、保湿防晒、防水防晒等不同特性,且常标示SPF指数和PA值。所谓SPF指数也就是化妆品防晒指数,是指皮肤抵抗紫外线的时间倍数。它 Collectively referred to as photodermatosis, including phototoxic dermatosis and photosensitivity (photo-allergic) dermatosis, which are caused or exacerbated by skin irritation caused by exposure to sunlight or other light. Go out to wear umbrella, straw hat or wear long-sleeved clothes “cover ” is the best way to protect the skin from light; secondly, you can choose the right sunscreen skin cream, the skin to avoid too strong or too much UV radiation . Now on the market sunscreen cosmetic whitening sunscreen, anti-wrinkle sunscreen, moisturizing sunscreen, waterproof sunscreen and other different characteristics, and often marked SPF index and PA value. The so-called SPF index is the sun lotion cosmetics, refers to the skin against UV multiple times. it