With winter coming to an end soon, the temperatures outside are getting warmer and the UV rays are getting fiercer, and how many people who are outdoors feel their skin red and hot and doubly sore at the end of the day. The sun’s ultraviolet rays are very harmful to the human body, short-term damage may tan you, but the long-term unseen damage may be to make your skin become sagging, dull, dry, spots, etc.. So how exactly do you protect yourself from the sun? Ultraviolet rays in the sun – the killer of skin aging UVA – accelerated skin aging, also known as “indoor ultraviolet”, which has a strong penetrating power, can penetrate most transparent glass and plastic, and can penetrate the dermis. It has a strong penetrating power, can penetrate most transparent glass and plastic, can penetrate the dermis, destroy elastin fibers and collagen fibers, make the skin tanning, and cause skin photoaging. In the distribution of ultraviolet energy in the sun, UVA is 15 times more than UVB, which is the main cause of skin tanning. UVB – darkens and darkens the skin It is also known as “outdoor ultraviolet” and is particularly strong in summer and late afternoon UVB has an erythematous effect on the human body and promotes mineral metabolism and vitamin D formation in the body, but it penetrates into the epidermis and causes the skin to dry out and become shortened. The skin becomes dry, is the skin in a short period of time sun red, sunburn (for the general public is about 25 minutes, sensitive muscle time is shorter). The choice of sunscreen 1, a correct understanding of the efficacy of sunscreen cosmetics logo SPF value reflects the product on the protective effect of UVB sunburn, PA level reflects the protective effect of UVA sun tanning. the higher the SPF value and PA level, the stronger the protection effect. 2, choose the strength of sunscreen protection should be based on the environment and the intensity of sunlight radiation to choose the strength of product protection. Outdoor activities in the summer should be higher than the protective strength of the products selected in the fall and winter. Winter outdoor or summer indoor work-oriented people to choose a medium protective effect of the product can be, such as SPF 8 ~ 15, PA +; summer outdoor SPF> 20, PA + + + products, long stay in the sun, such as excursions, coastal or snowy mountain environments should be used in high protective effect of the product, choose SPF> 30, PA + + + sunscreen; sun-sensitive people or patients suffering from photosensitive Patients with sun sensitivity or photosensitivity skin disease are recommended to use high protection effect products. 3, waterproof sunscreen In order to ensure that the efficacy of sunscreens maintained when sweating or swimming, the formula usually adds film-forming agents, silicone oils and other products to add water resistance. Therefore, in underwater activities or easy to sweat the environment, should choose the sunscreen labeled with water and sweat resistance. 4, the type of sunscreen Sunscreen products can generally be divided into physical sunscreen, chemical sunscreen. Physical sunscreen usually stays on the surface of the skin without chemical reaction, so it is milder on the skin. Chemical sunscreen products texture is more delicate, wipe on the skin feel more refreshing, more suitable for oily skin, but because the chemical sunscreen agent molecules will be absorbed by the skin, so the absorption of ultraviolet rays occurs inside the skin, and by the human body metabolism and removal, there is a certain degree of irritation to the skin, some products may cause allergies. The correct use of sunscreen 1, according to the skin type to choose the appropriate sunscreen Oily skin: easy to oil make-up, so penetration of strong water-based sunscreen supplies more practical; dry skin: more prone to dry skin, high degree of hydration cream sunscreen is more gentle insurance; healthy neutral skin: although the degree of choice is relatively large, but the indoor office is to hydrate the main outdoor can be combined with a high degree of sunscreen The skin with the spray together with the role of the skin. 2, coated in place to be effective – the amount can not save milky sunscreen: the size of a dollar coin is enough to a face of the amount of 2mm thickness, the size of a dollar amount of sunscreen to reach the standard, a little bit of a small number of times these coated in the face, so that the skin absorbs at the same time to maintain the amount of standard, of course, if you are born with a large face, I do not mind if you again! The amount of a pearl-sized plus code. Liquid sunscreen: 2 1 yuan coin amount, liquid texture is thinner than milky, portion of the same volume naturally larger, sub-squeeze the amount of 2 1 yuan coin coated the whole face is enough to meet the standard Oh. Spray sunscreen: see the traces to feel, as a water mist sunscreen supplies, the most secure spray method is to spray to the naked eye to see the sunscreen liquid across the skin before the end of the point. 3, it is very important to reapply or else all for naught The high sunscreen factor, a long time by the sweat, skin pan of the oil light destruction, will be completely lost, only diligent every two hours to reapply once in order to make the most effective sunscreen! However, make up before rubbing the skin must first wipe clean, not only can reduce the burden on the skin, but also can play its maximum skin care effectiveness. Ice is the most effective after the skin sunburn Sunburn symptoms: the skin has a burning sensation, red spots, peeling and even blisters. Fast and effective relief: ice. You can first rinse the sunburned area with cold water, and then use a towel wrapped in ice on the sunburned area until the skin feels comfortable.