扎心！90後已經開始囤防脫髮產品了，你的頭髮還好嗎？
Thinning hair, hair loss, and other hair-related issues can affect people as young as in their teens and early twenties.
人們在青少年和20歲出頭時，就有可能遇到頭髮變少、脫髮，以及其他頭髮相關的問題。
In fact, an estimated 40 percent of men will have noticeable hair loss by age 35, and an estimated 40 percent of women will have visible hair loss by the time they are 40.
數據顯示，約40%的男性到35歲時，髮量明顯減少。40%的女性到40歲時，髮量明顯減少。
所以，90後光頭強已上線，花季少女們也悄悄打響了“髮際線保衛戰”。
有數據爲證：一則阿里健康發佈的《拯救脫髮趣味白皮書》顯示，在零售平臺購買植髮護髮產品的消費者中，90後以36.1%的佔比，即將趕超80後，成爲防脫髮主力軍。
不得不說，“第一批90後已經禿了”話題已經在微博火了很久了。90後表示，還沒脫單，就開始脫髮了。
最怕網友突然的關心，近日@一禪小和尚在微博上發了一組扎心圖並喊話“你今天脫髮了嗎？” 炸出一衆憂傷到變形的禿友們。（小和尚關心我們脫髮？什麼心態？！）
網友的回覆更是揪心：
這個話題真的很沉重！
據說，如今告訴一個姑娘“你最近頭髮掉的有點多” ，比跟她說“你最近胖了”還要殘忍！因爲體重可以減，髮際線卻一去不復返。
你脫髮了嗎？
你如果不確定自己是否有比正常掉頭髮更嚴重的脫髮跡象，可以對照下面的描述：
► 男生
For men, thinning hair usually starts with either a receding hairline or thinning at the crown of the head.
對男性來說，頭髮變少通常始於髮際線後退或頭頂變稀疏。
► 女生
Women begin to notice thinning hair around their part, as it gradually becomes wider.
女性則會先注意到分界線的頭髮越來越少，分界線越來越寬。
They may also notice that when their hair is pulled back they are able to see more of the scalp than before.
還有，把頭髮往後梳時，露出的腦門越來越多。
其他可以參考的線索有：
Hair brush 梳子
If there are more strands of hair in your hair brush than normal, it may be a sign of beginning hair loss.
梳子上的髮絲如果比正常情況更多，也許是脫髮開始的徵兆。
Pillow 枕頭
A large amount of hair on your pillow when you wake up could be a sign that there is more happening than just normal hair falling out.
起牀後枕頭上留有大量頭髮絲，說明比正常掉髮更嚴重的事情正在發生。
反思一下你爲什麼脫髮
看着自己日漸稀疏的頭頂，你一定會問：“Why is my hair thinning?”
脫髮的原因因人而異，通常和飲食、壓力、遺傳有關……
其中，遺傳性脫髮佔比不少。
Hair loss can be hereditary. Hereditary hair loss is called androgenetic alopecia, or for males, male pattern baldness, and for females, female pattern baldness.
脫髮有可能是遺傳性的。遺傳性脫髮又稱爲雄激素源性脫髮，分爲男性雄性脫和女性雄性脫。
這種脫髮男女表現形式還不一樣，男性一般從髮際線往後脫，女性則是彌散性地脫。
Androgenetic alopecia occurs when a hair follicle sheds, and the hair that replaces it is thinner and finer than what was there previously. The hair follicles continue to shrink and eventually hair stops growing altogether.
遺傳性脫髮的過程是毛囊脫落，新長出的頭髮比之前更細軟，毛囊逐漸萎縮，最終頭髮停止生長。
It can be passed down from either the mother's or father's genes – but is more likely to occur if both parents have this issue.
父母的脫髮基因都可能遺傳給下一代，如果父母雙方都脫髮，下一代脫髮的可能性更高。
所以家裏直系親屬有脫髮史的，過了20歲，都可以着手預防起來了……
如果分性別來說的話，女生掉頭髮可能有以下幾個原因：
► Poor nutrition and low iron levels. 營養不良、缺鐵。
Women with heavy menses or who are anemic [ə'ni:mik] can experience hair loss.
經血多或貧血的妹子可能掉頭髮比較多。
► Wearing hair in tightly braided styles. 扎頭髮過緊。
► Starting or stopping birth control pills. 使用或停止使用避孕藥。
For some women BCP help slow hair loss, for others, they make it worse. 有些女生吃避孕藥會減緩脫髮，有些則會加劇脫髮。
► Cosmetic procedures such as bleaching or perming hair. 燙染等美髮手段
► Recent child birth 剛生完孩子
► Certain medications 某些藥物
► Thyroid problems, diabetes, other illnesses 甲狀腺、糖尿病等疾病
► Stress 壓力
知道大家壓力都很大，上學的每天不是在趕論文就是備考，上班的業務繁忙，談戀愛的心力交瘁……是的，研究表明壓力和脫髮也是有關聯的。
對於男生來說，脫髮原因一般比較簡單，遺傳爲主：
Thinning hair and hair loss in younger men is usually a result of androgenetic alopecia, but it can also be brought on by poor nutrition and stress.
年輕男性發量減少和脫髮通常是雄激素源性脫髮，但也有可能是營養不良和壓力造成的。
拿什麼拯救我的髮際線？
頭禿不可怕，保養有方法。面對骨感的現實，小夥伴們需要冷靜沉着，積極尋找防禿辦法。下面小編就帶你瞭解一些樸實有效的自救小貼士。
這裏首先要提醒大家，如果頭髮長期並且大量地脫落，需要引起強烈關注，及時到醫院就醫，檢查是否患有皮膚病或是其他引起脫髮的疾病。
如果不是以上情況，請跟着小編繼續閱讀下面的小貼士。防脫髮的基本原則是對頭髮好一點啦，不當的洗頭、梳頭姿勢和撕扯狀髮型都統統不要用。
➤Keep cool: In general, the less heat you use, the better. Styling with heat can damage the hair, and if you must use heated tools, pick those with adjustable settings and keep them on the lowest level.
讓頭髮涼爽點：給頭髮帶去的熱量越少越好。用熱風做造型很損害發質。如果一定要用加熱工具，用可調節溫度的並把溫度調至最低檔。
➤Brush with care: Used in conjunction with a blow-dryer, round metal brushes can heat up significantly, and some brushes with hard plastic or metal bristles can cause breakage. Instead, try a brush made of gentle boar bristles or flexible nylon.
溫柔點梳頭：圓形金屬梳子配合吹風機使用時，會急劇變熱。硬塑料梳和鋼絲鬃刷會損害頭髮。換一把豬鬃毛或者尼龍做的小梳子吧。
➤Get a volumizing cut: In most cases, shorter cuts are kinder to thinning hair. Whatever length you choose, ask for interior layers, which are placed throughout your cut, not just on the ends, to add fullness.
剪一頭精幹的短髮：多數情況下，短頭髮對髮量變少的人來說更友好。無論頭髮剪到什麼長度，都要讓理髮師給打層次，不僅髮尾，整個髮型都需要，這樣能製造髮量充盈感。
對於女生來說，把頭髮高高盤起或者鼓搗個緊繃繃的髮型都是很高危的動作了。
➤Switch your part: Hair tends to lie flatter against the scalp when brushed repeatedly in the same direction; if you typically part your hair on the left, flip it to the right, so it's more likely to stand away from your scalp and look more voluminous.
換個分縫方向：如果你總是把頭髮往同一個方向梳，頭髮就會趴在頭皮上。所以如果你習慣往左邊分縫的話，就把頭髮甩到右邊去，這樣你的頭髮就更容易從頭皮上“站”起來，看起來更濃密。
男士可以用髮髻來掩飾稀疏的頭頂。把頭頂附近的頭髮紮起來，就會給人一種髮量正常的錯覺。請看示例：
實在不行，就上假髮！
開玩笑啦，其實能從根本上解決問題的方法是飲食清淡、作息規律、不熬夜。你能做到嗎？
關於脫髮的幾個認識誤區
對脫髮的問題認識不清，病急亂投醫，那可是治不好脫髮的哦。來，這裏有幾個關於脫髮的誤區（myths），我們來認識一下。
❶ Over-shampooing causes hair loss. 頻繁洗頭會導致脫髮。
Many people tend to think that over-shampooing can cause hair loss because a lot of the time our hair falls out naturally in the shower, and it may seem like more hair falling out than normal.
很多人以爲頻繁洗頭會引起脫髮，其實洗頭時頭髮是自然脫落的，只是掉的頭髮看上去比平時要多一些。
Gel, hairspray and shampoo do not cause balding. But some men tease their hair and use curling irons, which could speed up the process.
髮膠、定型噴霧、洗髮水都不會引起脫髮。但是反梳頭髮、用燙髮鉗有可能加速脫髮。
❷ Wearing a hat strains hair follicles, causing hair to fall out. 戴帽子會對毛囊產生壓力，從而引起脫髮。
Good news for men who rely on caps to cover their shiny crowns: They're not causing any harm. Dirty hats can, however, lead to a scalp infection, which in turn accelerates hair loss, so either make sure yours is clean or rotate frequently.
用帽子遮謝頂的男士們有好消息了：帽子並不會對頭髮造成傷害，但髒帽子會！髒帽子有可能引發頭皮感染，進而加速脫髮。所以，要麼把帽子洗洗乾淨，要麼經常換着戴。
❸ Loading up on carbohydrates can lead to hair loss. 吃太多碳水化合物會導致脫髮。
Carbohydrates and red meat provide nutrients that are helpful for maintaining a full head of hair, says Wilma Bergfeld, a dermatologist at the Cleveland Clinic. Bergfeld's past research suggests that iron deficiency may be closely linked to hair loss. Treatment — like taking iron supplements—could restore growth.
克利夫蘭診所的皮膚科醫生威爾瑪·貝格菲爾德表示，碳水化合物和紅肉能提供營養，幫你保住濃密的頭髮。貝格菲爾德過去的研究還顯示，缺鐵跟脫髮密切相關，補鐵可以幫助頭髮恢復生長。
❹ The most sexually active men are the first to go bald. 性生活豐富的男性最容易禿頂。
This is one of the most popular myths. Relax — there's no truth to it. Research has also found that men who bald do not have more testosterone than their hairier friends.
這是最常見的誤區之一。放心吧，沒有這回事。研究還顯示，禿頂的男士體內的睾丸素並沒有比毛髮茂密的朋友更多。
