每次洗完頭，你有沒有糾結(jié)過頭發(fā)是自然晾干好，還是用吹風(fēng)機(jī)吹干好？換句話說：頭發(fā)長(zhǎng)時(shí)間濕著和短暫使用吹風(fēng)機(jī)熱風(fēng)，哪個(gè)傷害更大？

據(jù)最新研究，頭發(fā)濕太久，對(duì)頭發(fā)內(nèi)部的破壞，反而比科學(xué)用吹風(fēng)機(jī)吹干更嚴(yán)重。

A common hair-care dilemma has finally been put to the test: is it better to let your hair dry naturally, or to reach for the blow-dryer? In other words, which does more damage — prolonged moisture or brief bursts of heat?

According to a recent study, keeping hair wet for too long may actually harm its internal structure more than using a dryer correctly.

別再盲目自然干

風(fēng)險(xiǎn)比你想的大

很多人覺得自然干最護(hù)發(fā)，其實(shí)長(zhǎng)時(shí)間濕著頭發(fā)，隱患非常多。

首先是頭發(fā)本身會(huì)受傷。頭發(fā)濕的時(shí)候，內(nèi)部結(jié)構(gòu)會(huì)吸水膨脹，如果自然晾干要2-3小時(shí)，頭發(fā)的保護(hù)層會(huì)慢慢破裂，導(dǎo)致頭發(fā)變脆、容易斷、顏色變淺、毛躁分叉。

Many believe air-drying is the gentlest method, but leaving hair wet for extended periods comes with significant downsides.

First, hair itself suffers. When wet, the hair shaft absorbs water and swells. If left to air-dry for two to three hours, the protective outer layer (cuticle) can gradually crack, leaving hair brittle, prone to breakage, dull in color, frizzy, and split.

研究顯示，這種損傷比低溫吹風(fēng)還要高出40%以上。

其次是身體健康有風(fēng)險(xiǎn)。頭皮一直潮濕，容易滋生細(xì)菌真菌，引起頭屑、頭皮癢，嚴(yán)重的還會(huì)發(fā)炎；水分蒸發(fā)會(huì)帶走頭部熱量，刺激血管收縮，容易引發(fā)頭痛、感冒，冬天尤其明顯。

Studies show this type of damage can be over 40 percent greater than that caused by low-heat blow-drying.

Second, there are health risks. A persistently damp scalp encourages bacterial and fungal growth, leading to dandruff, itching, and even inflammation. As moisture evaporates, it draws heat away from the head, causing scalp blood vessels to constrict. This can trigger headaches and colds, especially in winter.

吹風(fēng)機(jī)用對(duì)了反而護(hù)發(fā)

吹風(fēng)機(jī)本身不傷發(fā)，錯(cuò)在溫度太高、吹太久。只要方法科學(xué)，吹風(fēng)比自然干更安全。

正確吹頭發(fā)的方法：用中低溫，吹風(fēng)機(jī)離頭發(fā)15-20厘米，不停移動(dòng)，不要一直對(duì)著一個(gè)地方吹；先吹頭皮，再吹發(fā)梢，順著頭發(fā)生長(zhǎng)的方向吹；吹到八成干就可以，最后用冷風(fēng)定型，讓毛鱗片閉合，頭發(fā)更順滑。

A blow-dryer itself isn't harmful — improper use, such as excessively high heat or prolonged exposure, is the real issue. With the right technique, blow-drying can be safer than air-drying.

Proper blow-drying tips: Use medium or low heat. Keep the dryer 15–20 cm away from your hair and keep it moving — never concentrate on one spot. Start with the scalp, then move to the ends, drying in the direction of hair growth. Stop when hair is about 80 percent dry. Finish with a cool shot to seal the cuticles, leaving hair smoother and shinier.

現(xiàn)在的高速吹風(fēng)機(jī)風(fēng)力大、溫度穩(wěn)定，幾分鐘就能吹干長(zhǎng)發(fā)，熱風(fēng)接觸時(shí)間短，還能撫平毛躁，對(duì)頭發(fā)更友好。

最推薦的護(hù)發(fā)干發(fā)法：

混合吹干

結(jié)合自然干和吹風(fēng)的優(yōu)點(diǎn)，混合干發(fā)是最穩(wěn)妥、最護(hù)頭發(fā)的方式，適合絕大多數(shù)人。

先用毛巾輕輕按干水分，千萬(wàn)不要用力揉搓；再把頭皮徹底吹干，這一步最重要，能避免細(xì)菌、頭痛問題；發(fā)梢留一點(diǎn)濕度，讓它自然晾干，避免過度干燥；半干時(shí)抹一點(diǎn)護(hù)發(fā)精油再吹，鎖水又順滑。

Combining the best of air-drying and blow-drying, the hybrid approach is the safest and most hair-friendly routine for most people.

Gently press out excess water with a towel — never rub vigorously. Thoroughly dry the scalp with a blow-dryer. This is the most important step to prevent bacterial issues and headaches. Leave the ends slightly damp and let them air-dry naturally to avoid over-drying. When hair is half-dry, apply a little hair oil, then continue blow-drying to lock in moisture and enhance smoothness.

為什么“吹頭發(fā)”不用

blow my hair?

單獨(dú)用blow是 “吹氣”，不是 “吹頭發(fā)”。老外聽到你說 "I'm blowing my hair"，腦海里浮現(xiàn)的畫面可能是你在用嘴對(duì)著頭發(fā)哈氣，而不是拿著吹風(fēng)機(jī)。

在英語(yǔ)中，blow作為及物動(dòng)詞時(shí)，意思是 “用氣流推動(dòng)某物”。

如果你說blow my hair，邏輯是：你用氣流（通常是嘴）去吹動(dòng)你的頭發(fā)。這就像說blow the candle（吹蠟燭）、blow the dust（吹灰塵）一樣。

中文的 “吹” 在特定語(yǔ)境下默認(rèn)了工具，但英文的blow 是一個(gè)泛泛的動(dòng)作。

• 要表達(dá)使用吹風(fēng)機(jī)，必須體現(xiàn)出工具或復(fù)合動(dòng)作。

• 完整的邏輯是：blow（吹）+ dry（干）。

• 這就組合成了固定動(dòng)詞短語(yǔ) blow-dry，這才是 “用吹風(fēng)機(jī)吹干” 的專用詞。

你可能會(huì)問：“那為什么老外有時(shí)只說blow it？”這是口語(yǔ)中的省略，但必須滿足兩個(gè)條件：

① 語(yǔ)境極其明確（比如你手里正拿著吹風(fēng)機(jī)，或者剛洗完頭）。

② 必須加代詞It。

? I need to blow it. (可以，因?yàn)?It 指代了 hair，且語(yǔ)境默認(rèn)是用機(jī)器)。

? I need to blow my hair. (錯(cuò)誤，聽起來像用嘴)。

關(guān)于吹頭發(fā)，你還有什么習(xí)慣或者心得？歡迎在評(píng)論區(qū)留言分享。

來源：外研社

跟著China Daily

精讀英語(yǔ)新聞

“無痛”學(xué)英語(yǔ)，每天20分鐘就夠！