爲什麼抹了防曬霜還是會被曬傷
Sunburned isn't a good look for anyone, particularly since scorching your skin just once every two years can triple ( !) your risk of melanoma.
任何人曬傷後都不好看，每兩年曬傷一次更會使你患黑色素瘤的風險增加三倍。And while most people know better than to expose their skin to sunshine without any sunscreen, sometimes your best efforts to lather up just aren't good enough, according to Lauren Ploch, MD, a board-certified dermatologist and member of the American Academy of Dermatology.
雖然大多數人都知道不抹防曬霜就不要暴露在陽光下，但有時，你最大的努力還是不夠，持證皮膚科醫師兼美國皮膚醫學學會成員勞倫·普洛赫醫學博士說道。1. You use sunscreen - but use way too little.
1. 你的確抹了防曬霜--但抹的太少了。
Just like using foundation or nail polish, you need to apply enough sunscreen for sufficient coverage. After all, sunscreen will only perform to the full potential of its SPF - i.e., if you're using SPF 30, protect your skin for 30 times longer than your bare skin would last in the sun without burning - if enough sunscreen is applied, according to Dr. Ploch, who adds that skimping on sunscreen will diminish the sunscreen's efficacy. For full-body coverage, she says to apply at least one ounce (aka one full shot glass) of sunscreen. That goes for "natural" or "mineral" formulas, too, which people tend to under-apply since even small amounts can turn the skin white.
就像上底妝或塗指甲油一樣，你需要抹足夠多的防曬霜才能全面覆蓋。畢竟，防曬霜的效果只能如其防曬係數一般--也就是說，如果你用的是防曬係數爲30的防曬霜，那麼在不灼燒的情況下，相比什麼都不塗，抹足夠多的防曬霜能保護你的皮膚長達30多次，普洛赫博士說，她補充說，如果防曬霜用的少，那麼其防曬效果也會減弱。若想要覆蓋全身，那就至少要抹一盎司的防曬霜（也就是一酒杯的量）。要選擇"天然"或"礦物"配方的產品哦！由於抹一點點就會顯白，因此人們才傾向於少量塗抹。2. You use sunscreen - but sweat like crazy.
2. 你的確抹了防曬霜--但卻流汗太多。Even if you lather up from head to toe in your shot glass amount of sunscreen, working up a solid sweat (or simply hanging in a humid environment, which leads to oily, sweaty skin) can completely wash the sunscreen off your body. Think of sweating as the sticky, stinky equivalent of showering or swimming, two other surefire ways to rinse the sunscreen off your skin and leave you unprotected.
即使你從頭到腳都抹了一酒杯量的防曬霜，但總是流汗（或是處於潮溼的環境，這樣就會導致皮膚出油、易出汗）會使身上的防曬霜完全流失。流汗就是變相粘稠的洗澡或游泳，洗澡或游泳也會洗掉你的防曬霜、讓你不再受到保護。
To properly protect your skin, reapply sunscreen every time your skin gets wet or clammy. And because chemical sunscreens tend to stand up to moisture best, go for a "broad-spectrum" sunscreen, which combines UVB- and UVA-absorbing chemicals and ingredients like titanium dioxide and zinc oxide to physically block sun rays.
想要正確保護皮膚，那每當皮膚潮溼或粘稠時，都該重新塗抹防曬霜。因爲化學防曬霜往往能最佳保溼，所以選擇"廣譜"防曬霜吧，該防曬霜將吸收紫外線B光譜和紫外線A光譜的化學物質以及二氧化鈦和氧化鋅等元素混合在一起，可有效阻擋太陽光線。3. You use sunscreen - but mistake "waterproof" for bulletproof.
3. 你的確抹了防曬霜--但卻錯誤的以爲"防水"就是防彈。Unbeknown to many sunscreen users, "waterproof" formulas won't protect your skin all day, and neither will a sunscreen billed as "water-resistant." (Come on guys, it's not mascara!) Even without swimming or sweating, you'll still need to reapply every 80 minutes, according to Dr. Ploch, since it's only proven to protect you for that long.
很多防曬霜使用者都不知道這一點："防水"配方不會整天都保護你的肌膚，也不會將其稱爲"抗水。"（得了吧，夥計們，這又不是睫毛膏！）普洛赫博士說，即使你不游泳也不流汗，但每過80分鐘，你都需要重新塗抹，因爲研究證明防曬霜的有效時間只有80分鐘。
