頭發(fā)斷裂是怎么回事

There are many different hair types, from curly to straight to wavy. When it starts breaking, though, you might notice frizz or coarseness, especially at the ends or near the roots (via Medical News Today). But why does this happen?

從卷發(fā)到直發(fā)再到波浪發(fā)，有許多不同的頭發(fā)類型。當頭發(fā)開始斷裂時，你可能會注意到卷曲或粗糙，特別是在末端或根部附近。但是為什么會這樣呢?

First, we have to understand how hair grows. The hair that grows out of our scalp is made of dead cells, similar to our fingernails, according to Healthline. Strands of hair are called hair shafts or filaments, and they're mostly made from a protein called keratin. Each shaft grows from a hair follicle, which we have all over our bodies, except for places like our lips and palms. Each follicle contains a bulb, where blood vessels send nutrients and grow hair cells. As new strands of cells are made, the old ones get pushed out, which is what we see. So the new cells are rooted in the bulb while the old cells lengthen into strands of hair, which is why we can't feel pain when our hair is cut.

首先，我們必須了解頭發(fā)是如何生長的。根據Healthline的說法，從頭皮上長出來的頭發(fā)是由死細胞組成的，與我們的指甲相似。一縷一縷的頭發(fā)被稱為發(fā)干或發(fā)絲，它們主要由一種叫做角蛋白的蛋白質構成。每根發(fā)絲都是由毛囊長出來的，毛囊遍布全身，除了嘴唇和手掌等部位。每個毛囊包含一個球莖，血管在那里輸送營養(yǎng)物質并生長毛細胞。隨著新的細胞鏈的形成，舊的細胞被擠出，這就是我們所看到的。因此，新的細胞扎根于鱗莖中，而舊的細胞則延伸成頭發(fā)，這就是為什么我們剪頭發(fā)時感覺不到疼痛的原因。

The follicles go through different stages, so at any given point, they may be actively growing, transitioning, or resting, which is when strands can fall out, according to Healthline. But what if breakage is a major issue?

據Healthline網站報道，毛囊會經歷不同的階段，所以在任何時候，它們都可能在積極生長、過渡或休息，此時頭發(fā)可能會脫落。但如果鍛煉情況很嚴重呢?

Even though the hair we see is technically dead, it still requires care. If it isn't getting the proper care, it can break. Here are a few reasons why.

即使我們看到的頭發(fā)嚴格來說是死的，它仍然需要護理。如果沒有得到適當的護理，它可能會破裂。以下是一些原因。

The products you use could affect the strength of your hair (via Medical News Today). Harsh chemicals found in things like colorants, relaxers, and even some shampoos can cause hair to become brittle and eventually break. The way you style your hair could also take a toll. Using too much heat from a hairdryer, straightener, or curling iron, can strip moisture and cause breakage. Over-brushing is another way the strands can snap. Additionally, styling your hair too tightly can cause strain on the root and ultimately breakage.

你使用的產品可能會影響你頭發(fā)的強度。在諸如著色劑、松弛劑甚至一些洗發(fā)水中發(fā)現的刺激性化學物質會導致頭發(fā)變脆并最終斷裂。你的發(fā)型也會對你造成影響。使用吹風機、矯直機或卷發(fā)器產生的熱量過多，可能會帶走水分并導致斷裂。過度梳理是發(fā)絲斷裂的另一種方式。此外，發(fā)型設計太緊會導致發(fā)根拉傷，最終導致斷裂。

Health and lifestyle factors can also affect your hair. Stress and anxiety, along with any severe trauma or shock, can damage the hair, according to Medical News Today. Thyroid disorders and eating disorders can also affect hair's health and the cycle of hair growth, leading to breakage and loss.

健康和生活方式因素也會影響你的頭發(fā)。據《今日醫(yī)學新聞》報道，壓力和焦慮以及任何嚴重的創(chuàng)傷或休克都會損害頭發(fā)。甲狀腺疾病和飲食失調也會影響頭發(fā)的健康和頭發(fā)生長周期，導致頭發(fā)斷裂和脫落。

If you notice your hair starting to break, you can help repair and prevent breakage by getting regular haircuts, changing your hair care routine, reducing stress, and getting plenty of protein, omega-3s, iron, biotin, and zinc in your diet.

如果你注意到你的頭發(fā)開始斷裂，你可以通過定期理發(fā)、改變你的頭發(fā)護理程序、減少壓力、在飲食中攝入大量蛋白質、ω-3脂肪酸、鐵、生物素和鋅來幫助修復和防止斷裂。