The temperature outside is getting higher and higher, the UV rays are getting more and more fierce, how many people who are outdoors feel their skin red and hot and doubly sore after a day. The ultraviolet rays of the sun are very harmful to the human body, short-term damage may put you tanned, long-term unseen damage but may be to make your skin sagging, dull, dry, long spots, etc.. So how exactly should I protect myself from the sun? The sun’s ultraviolet rays – skin aging killer 1, UVA – accelerated skin aging also known as “indoor ultraviolet”, it has a strong penetrating power, can penetrate most transparent glass and plastic, can penetrate The glass and plastic, can penetrate the dermis, destroy elastic fibers and collagen fibers, make skin tanning, and cause skin photoaging. In the sun’s ultraviolet energy distribution, UVA is 15 times more than UVB, is the main cause of skin tanning. 2, UVB – make the skin darker and darker also known as “outdoor UV”, in the summer and afternoon will be particularly strong. UVB ultraviolet light on the human body with erythema effect, can promote the body’s mineral metabolism and vitamin D formation, but it can penetrate to the epidermis, making the skin dry, is the skin in the skin. Make the skin dry, is the skin in a short period of time sun red, sunburn (for the average person is about 25 minutes, sensitive skin time is even shorter). The higher the SPF value and PA level, the stronger the protection effect. 2, choose the sunscreen protection strength should be based on the environment and the intensity of sunlight radiation to choose the product protection strength. Summer outdoor activities should be higher than the protection strength of the product selected in autumn and winter. Winter outdoor or summer indoor work-oriented people choose medium protection effect products can be, such as SPF for 8 ~ 15, PA +; summer outdoor can choose SPF> 20, PA + + + products, long stay in the sun such as excursions, coast or snowy mountain environment should use high protection effect products, choose SPF> 30, PA + + + sunscreen; sun-sensitive people or suffer from photosensitivity Patients who are sensitive to the sun or suffer from photosensitive skin disease are recommended to use high protection effect products. 3, sunscreen water resistance In order to ensure that the effectiveness of the sunscreen is maintained when sweating or swimming, the formulation will usually add film-forming agents, silicone oil, etc. to increase the product’s water resistance. Therefore, in underwater activities or easy to sweat in the environment, you should choose the logo with water and sweat resistant sunscreens. 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, no chemical reaction occurs, so it is milder to the skin. Chemical sunscreen products are more delicate in texture, wiped on the skin feel more refreshing, more suitable for oily skin, but because the chemical sunscreen molecules will be absorbed by the skin, so the process of absorbing ultraviolet light occurs inside the skin, and by the body’s metabolism and removal, there is a certain degree of skin irritation, some products may cause allergies. The correct use of sunscreen 1, according to the skin type to choose the right sunscreen for their oily skin: easy to oil makeup, so strong penetration of water-based sunscreen supplies more practical; dry skin: more prone to dry skin, high hydration cream sunscreen is more mild insurance; healthy neutral skin: although the degree of choice is relatively large, but the indoor office is based on hydration, outdoor can be combined with high multiples of sunscreen with the spray together with the role of the skin. 2, coated in place to be effective – the amount can not be saved milky sunscreen: 1 dollar coin size is enough for a face dosage of 2mm thickness, 1 dollar size of sunscreen amount to meet the standard, a little bit of a small number of times to apply these on the face, so that the skin absorbed while maintaining the amount of standard, of course, if you are born with a large pancake face, I do not mind you again Add the size of a pearl size dosage. The amount of liquid sunscreen: 2$1 coins, liquid texture is thinner than the cream, the same amount of volume naturally become larger, squeeze 2$1 coins in two times the amount of the whole face coated enough to meet the standard Oh. Spray sunscreen: see the traces to have a sense, as a water mist sunscreen products, 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 step. 3, reapplication is very important otherwise all for naught The high sun protection coefficient, a long time by sweat, skin pan oil destroy, will also completely lose the battle, only diligent every two hours to reapply a rub to make the most effective sunscreen! However, before replenishing the rub must first wipe the skin clean, not only can reduce the burden on the skin, but also can play its maximum skin care effectiveness. Skin sunburn ice packs are the most effective sunburn symptoms: burning skin, red spots, peeling skin and even blisters; fast and effective relief: ice packs. You can first rinse the sunburn with cold water, then wrap a towel with ice on the sunburned area until the skin feels comfortable.