Face allergic to ultraviolet rays there are several ways: 1, pay attention to sun protection, hold an umbrella, wear a mask, wear a hat, apply sunscreen. The most direct is to apply sunscreen externally, apply sunscreen at least 30 minutes before going out and once every 4 hours, you can apply sunscreen with high multiples in summer and low multiples in winter. 2, do not eat light-sensitive foods. Some foods can cause UV allergies, such as lettuce, spinach, mustard, marjoram, amaranth, lemon, leek, parsley, etc. These foods contain light-sensitive substances, after eating more of these foods will increase the body’s degree of photosensitivity to UV rays, allergies to UV rays are more likely to appear. 3, the skin will be red and swollen after UV exposure, avoid hot water, alkaline cleaning, which can easily cause the stratum corneum to thin. It will lead to a more serious situation.