Summarize this article in one sentence.
The FDA requires sunscreen to retain its protective power for at least three years from the date of manufacture. However, you should always note expiration dates. If the date has passed, ditch the old bottle and buy some new sunscreen.  If your product doesn’t have an expiration date when you purchase it, use a permanent marker or a label to write the purchase date on the bottle. This way you’ll know how long you’ve had the product. Obvious changes in the product, such as color changes, separation, or different consistency, are signs that the sunscreen has expired. The chemicals in sunscreen take time to bind to your skin and become fully protective. Apply your sunscreen before you go out.  Sunscreen on the skin should be applied 30 minutes before you go out into the sun. Lip sunscreen should be applied 45-60 minutes before going into the sun.  Sunscreen needs to :"cure" on the skin to be fully effective. This is especially important in the water-resistance factor. If you put on sunscreen and jump into the pool 5 minutes later, much of your protection will be lost. This is also very important for caring for children. Children are usually wriggly and impatient, and are usually doubly so when excited about an outdoor adventure; after all, who can stand still when the ocean is right there? Instead, try to sunscreen before leaving the house, or in the parking lot, or waiting for the bus. One of the biggest mistakes in using sunscreen is to not use enough. Adults usually need about one ounce -- a palm-ful, or about a shot glass full -- of sunscreen to cover exposed skin.  To apply cream or gel sunscreen, squeeze a dollop into your palm. Spread it all over the skin that will be exposed to the sun. Rub the sunscreen into your skin until you can't see the white anymore. To apply spray sunscreen, hold the bottle upright and move the bottle back and forth across your skin. Apply an even, generous coating. Make sure the wind doesn’t blow the sunscreen away before it contacts your skin. Don’t inhale spray sunscreen. Be careful when applying spray sunscreens around the face, especially around children. Remember areas like your ears, neck, the tops of your feet and hands, and even the part in your hair. Any skin that will be exposed to sunlight should be covered with sunscreen.  It can be hard to fully cover hard-to-reach areas such as your back. Ask someone to help you apply sunscreen to these areas. Thin clothing often doesn’t offer much sun protection. For example, a white t-shirt has an SPF of just 7. Wear clothing designed to block UV rays, or wear sunblock under your clothes. Your face needs even more sunscreen than the rest of your body, as many skin cancers occur on the face, especially on or around the nose. Some cosmetics or lotions may contain sunscreen. However, if you’re going to be outside for more than 20 minutes (total, not at a time) you’ll want to apply a facial sunscreen too.  Many facial sunscreens come in cream or lotion form. If you use a spray sunscreen, spray it into your hands first, then apply it to your face. It's best to avoid spray sunscreens on the face if possible. The Skin Cancer Foundation has a searchable list of recommended facial sunscreens.  Use a lip balm or lip sunscreen with an SPF of at least 15 on your lips. If you are bald or have thin hair, remember to apply sunscreen to your head, too. You can also wear a hat to help protect against sun damage. Studies have shown that re-applying your sunscreen after about 15-30 minutes after going into the sun is more protective than waiting 2 hours. Once you’ve done this initial reapplication, re-apply sunscreen every 2 hours or as directed on the label.
Check the expiration date. Apply before going out in the sun. Use enough. Apply sunscreen to all skin. Don’t forget your face. Reapply after 15-30 minutes.
Sammanfatta den här artikeln i en mening. FDA kräver solskyddsmedel för att behålla sin skyddande kraft i minst tre år från tillverkningsdatumet. Du bör dock alltid notera utgångsdatum. Om datumet har passerat, dumpa den gamla flaskan och köp lite ny solkräm. Om din produkt inte har ett utgångsdatum när du köper den, använd en permanent markör eller en etikett för att skriva inköpsdatum på flaskan. På så sätt vet du hur länge du har haft produkten. Tydliga förändringar i produkten, såsom färgförändringar, separation, eller olika konsistens, är tecken på att solskyddsmedel har gått ut. Kemikalierna i solskyddsmedel tar tid att binda till huden och bli helt skyddande. Applicera solkrämen innan du går ut. Solskydd på huden bör appliceras 30 minuter innan du går ut i solen. Lip solskydd bör appliceras 45-60 minuter innan du går in i solen. Solskydd behöver : "bota" på huden för att vara fullt effektiv. Detta är särskilt viktigt i vattenresistensfaktorn. Om du sätter på solkräm och hoppa i poolen 5 minuter senare, mycket av ditt skydd kommer att förloras. Detta är också mycket viktigt för att ta hand om barn. Barn är oftast vresig och otålig, och är oftast dubbelt så när upphetsad över ett utomhusäventyr; när allt kommer omkring, vem kan stå stilla när havet är just där? Försök i stället att solskydda dig innan du lämnar huset, eller på parkeringen, eller väntar på bussen. Ett av de största misstagen med att använda solskyddsmedel är att inte använda tillräckligt. Vuxna behöver vanligtvis ungefär ett uns -- en handflator-full, eller om ett skottglas fullt -- av solskydd för att täcka exponerad hud. För att applicera kräm eller gel solkräm, tryck en klick i handflatan. Sprid det över hela huden som kommer att exponeras för solen. Gnugga in solkrämen i huden tills du inte kan se det vita längre. För att applicera spraysolkräm, håll flaskan upprätt och flytta flaskan fram och tillbaka över huden. Applicera en jämn, generös beläggning. Se till att vinden inte blåser bort solkrämen innan den kommer i kontakt med huden. Inhalera inte solskyddskräm. Var försiktig när du applicerar spraysolkrämer runt ansiktet, speciellt runt barn. Kom ihåg områden som öron, hals, fötter och händer, och även delen i håret. Hud som exponeras för solljus ska täckas med solskydd. Det kan vara svårt att helt täcka svåråtkomliga områden som ryggen. Be någon att hjälpa dig att applicera solkräm på dessa områden. Tunna kläder ger ofta inte mycket solskydd. Till exempel har en vit t-shirt en SPF på bara 7. Bär kläder som är utformade för att blockera UV-strålar, eller bära solskydd under kläderna. Ditt ansikte behöver ännu mer solskydd än resten av kroppen, eftersom många hudcancerfall förekommer i ansiktet, särskilt på eller runt näsan. Vissa kosmetika eller lotion kan innehålla solskyddsmedel. Men om du kommer att vara utanför i mer än 20 minuter (totalt, inte i taget) du kommer att vilja applicera en ansikts solkräm också. Många ansiktssolkrämer kommer i kräm- eller lotionform. Om du använder en spray solkräm, spraya den i händerna först, applicera den sedan i ansiktet. Det är bäst att undvika spray solskyddsmedel i ansiktet om möjligt. Hudcancerstiftelsen har en sökbar lista över rekommenderade ansiktssolkrämer. Använd ett läppbalsam eller läppsolkräm med en SPF på minst 15 på läpparna. Om du är skallig eller har tunt hår, kom ihåg att applicera solkräm på huvudet också. Du kan också bära en hatt för att skydda mot solskador. Studier har visat att det är mer skyddande än att vänta 2 timmar att åter applicera solkrämen efter ca 15-30 minuter efter att ha gått in i solen. När du har gjort denna första omapplicering, åter applicera solkräm varannan timme eller enligt anvisningarna på etiketten.
Summarize this article in a sentence. The FDA requires sunscreen to maintain its protective power for at least three years from the date of manufacture. However, you should always note the expiry date. If the date has passed, dump the old bottle and buy some new sunscreen. If your product does not have an expiry date when you purchase it, use a permanent marker or label to write the purchase date on the bottle. This way you know how long you have had the product. Clear changes in the product, such as color changes, separation, or different consistency, are signs that sunscreen has expired. The chemicals in sunscreen take time to bind to the skin and become completely protective. Apply the sunscreen before you go out. Sun protection on the skin should be applied 30 minutes before entering the sun. Lip sunscreen should be applied 45-60 minutes before entering the sun. Sun protection needs : "cure" on the skin to be fully effective. This is particularly important in the water resistance factor. If you put on sunscreen and jump into the pool 5 minutes later, much of your protection will be lost. This is also very important for caring for children. Children are usually cranky and impatient, and are usually twice as excited about an outdoor adventure; after all, who can stand still when the sea is right there? Instead, try to protect yourself before leaving the house, or in the parking lot, or wait for the bus. One of the biggest mistakes in using sunscreen is not to use enough. Adults usually need about one ounce -- a palm-full, or about a shot glass full -- of sunscreen to cover exposed skin. To apply cream or gel sunscreen, press a click in the palm of your hand. Spread it all over the skin that will be exposed to the sun. Rub the sunscreen into the skin until you can't see the white anymore. To apply spray sunscreen, keep the bottle upright and move the bottle back and forth over the skin. Apply a smooth, generous coating. Make sure that the wind does not blow away the sunscreen before it comes into contact with the skin. Do not inhale sunscreen. Be careful when applying spray sun creams around your face, especially around children. Remember areas such as ears, neck, feet and hands, and also the part of the hair. Skin exposed to sunlight should be covered with sunscreen. It can be difficult to completely cover difficult areas such as the back. Ask someone to help you apply sunscreen to these areas. Thin clothes often do not provide much sun protection. For example, a white t-shirt has a SPF of just 7. Wear clothing designed to block UV rays, or wear sunscreen under the clothes. Your face needs even more sunscreen than the rest of your body, as many skin cancers occur on your face, especially on or around your nose. Some cosmetics or lotions may contain sunscreens. But if you will be outside for more than 20 minutes (total, not at a time) you will want to apply a face sunscreen as well. Many face sunscreens come in cream or lotion form. If you use a spray sunscreen, spray it into your hands first, then apply it to your face. It is best to avoid spray sunscreen on the face if possible. The skin cancer foundation has a searchable list of recommended facial sunscreens. Use a lip balm or lip sun cream with a SPF of at least 15 on the lips. If you are bald or have thin hair, remember to apply sunscreen to your head as well. You can also wear a hat to protect against sun damage. Studies have shown that it is more protective than waiting 2 hours to re-apply the sunscreen after about 15-30 minutes after entering the sun. Once you have done this first re-application, re-apply sunscreen every two hours or as instructed on the label.
Kontrollera utgångsdatumet. Applicera innan du går ut i solen. Använd tillräckligt. Applicera solskydd på hela huden. Glöm inte ditt ansikte. Återapplicera efter 15-30 minuter.
Check the expiry date. Apply before you go out in the sun. Use enough. Apply sunscreen on the entire skin. Don't forget your face. Reapply after 15-30 minutes.