Health encyclopaedia - Alphabetical Topic List健康百科全书-按字母顺序排列的主题清单

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Causes of Acne原因痤疮

Acne that begins at puberty is the result of increased sensitivity to the hormone testosterone, which is present in both boys and girls.痤疮开始在青春期，是由于增加的敏感性，激素睾酮，这是目前在这两个男孩和女孩。 Testosterone causes excessive sebum to be secreted from the skin’s sebaceous glands.睾酮的原因，以皮脂过度分泌，从skinâ € ™ s皮脂腺。 Skin cells rapidly divide and sometimes block the opening of hair follicles.皮肤细胞快速分裂，有时座开放的毛囊。 The resulting build up of sebum behind the blockage helps produce blackheads and whiteheads.由此建立的皮脂背后的淤塞，有利于生产blackheads和whiteheads 。

At puberty changes in skin acid levels also encourage the growth of bacterium, which can become trapped in the hair follicles.在青春期的变化，皮肤酸水平还鼓励增长的细菌，它可以成为被困在毛囊。 This produces a deeper infection, in the form of pustules and nodules.这产生一个更深的感染，在形式，脓疱和结节。

Other causes:其他原因：

  • Acne sometimes seems to run in families, so there may be a genetic factor that makes certain people more likely to have it.痤疮有时似乎是运行在家庭，因此，可能会有遗传因素使某些人更可能有它。
  • Acne may become worse in times of stress, although it is not clear why.痤疮有可能成为更糟的时候，强调，虽然目前尚不清楚为什么。 It may be because stressed people touch their faces more, spreading the bacteria, or because they are sweating more.这可能是因为强调人接触，他们面临着更多，散布细菌，或因为他们是出汗更多。
  • In girls, outbreaks may be affected by the hormonal changes that occur during the menstrual cycle.在女孩，爆发可能受激素的变化过程中发生的月经周期。
  • Another cause may be excessive production of androgens (hormones like testosterone), resulting not from puberty but from conditions such as polycystic ovary syndrome (PCOS).另一个原因可能是过度的生产雄激素（雌激素一样，睾酮） ，导致不能从青春期但是，从条件，如多囊卵巢综合征（ PCOS ） 。
  • Certain drugs such as corticosteroids, anti-epileptic medicines like phenytoin, and oral contraceptives containing levonorgestrel or norethisterone, may aggravate acne.某些药物如类固醇，抗癫痫药物一样，苯妥英，口服避孕药含左炔诺孕酮或炔诺酮，可能加剧痤疮。
  • Anabolic steroids, sometimes used by body-builders, can cause acne as a side-effect.合成代谢类固醇，有时用身体的建设者，可导致痤疮作为一个副作用。
  • Exposure to dangerous chemicals called dioxins can cause a rare form of acne called chloracne.暴露于危险化学品的所谓的二恶可导致一种罕见形式的痤疮所谓chloracne 。

Eating greasy foods or chocolate does not cause acne.吃油腻食物或巧克力不会导致痤疮。 Having poor hygiene is also not a direct cause, although if you do not wash your face or remove make-up, bacteria will be able to multiply on your skin.差生也并不是一个直接原因，但如果你不洗你的脸或删除作出跟进，细菌将能够乘上你的皮肤。