贝佐斯都脱发说明脱发没得救（范思晖译）

What Causes Hair Loss?脱发的原因，今天小编就来聊一聊关于贝佐斯都脱发说明脱发没得救?接下来我们就一起去研究一下吧!

贝佐斯都脱发说明脱发没得救

What Causes Hair Loss?

脱发的原因

Doctors don't know why certain hair follicles are programmed to have a shorter growth period than others. However, several factors may influence hair loss:

医生也不清楚，为什么某些毛囊天生就比其他的毛囊生长期短。然而，某些因素可能影响脱发：

Hormones, such as abnormal levels of androgens (male hormones normally produced by both men and women)

激素，比如异常水平的雄激素（男人和女人都正常分泌的男性激素）。

Genes, from both male and female parents, may influence a person's predisposition to male or female pattern baldness.

基因，同时来自男性和女性父母的，可能影响一个人男性或女性模式秃头的倾向。

Stress, illness, and childbirth can cause temporary hair loss. Ringworm caused by a fungal infection can also cause hair loss.

压力、疾病和生孩子都会引起暂时性脱发。真菌感染引起的皮癣也会引起脱发。

Drugs, including chemotherapy drugs used in cancer treatment, blood thinners, beta-adrenergic blockers used to control blood pressure, and birth control pills, can cause temporary hair loss.

药物，包括癌症治疗中使用的化疗药物，血液稀释剂，用于控制血压的β-肾上腺素能阻断剂，以及避孕药，都会造成暂时性脱发。

Burns, injuries, and X-rays can cause temporary hair loss. In such cases, normal hair growth usually returns once the injury heals unless a scar is produced. Then, hair will never regrow.

烧伤、受伤和X光会造成暂时性脱发。在这些情况下，一旦损伤愈合，头发正常生长通常就会恢复，除非出现了伤疤——这时，头发永远不会再长了。

Autoimmune disease may cause alopecia areata. In alopecia areata, the immune system revs up for unknown reasons and affects the hair follicles. In most people with alopecia areata, the hair grows back, although it may temporarily be very fine and possibly a lighter color before normal coloration and thickness return.

自身免疫性疾病可能会造成斑秃。在斑秃的情况下，人体免疫系统会因为不明原因而激发起来，影响毛囊。对于大多数斑秃患者，头发会重新长出，尽管在恢复正常的着色和厚度之前，头发可能会暂时性的非常细小，或许颜色也较浅。

Cosmetic procedures, such as shampooing too often, perms, bleaching, and dyeing hair can contribute to overall hair thinning by making hair weak and brittle. Tight braiding, using rollers or hot curlers, and running hair picks through tight curls can also damage and break hair. However, these procedures don't cause baldness. In most instances hair grows back normally if the source of the problem is removed. Still, severe damage to the hair or scalp sometimes causes permanent bald patches.

化妆行为，比如太过频繁的洗头、烫发、脱色和染发，会使头发不牢固且易碎，从而促使头发整体上变稀疏。辫子编得太紧，使用卷发筒或烫的卷发夹，以及让发夹穿过紧紧卷在一起的头发，都会损害和弄断头发。不过，这些做法不会造成秃头。大多数情况下，如果问题的根源解决了，头发都会正常长回来。不过，对头发或头皮严重的损害会造成永久性的脱发块。

Medical conditions. Thyroid disease, lupus, diabetes, iron deficiency, eating disorders, and anemia can cause hair loss. Most times, when the underlying condition is treated, the hair will return unless there is scarring as in some forms of lupus, lichen planus or follicular disorders.

医疗状况。甲状腺疾病、狼疮、糖尿病、缺铁、饮食失调和贫血都会造成脱发。多数时候，在治好这些根本的病症后，头发都会复原，除非像某些狼疮、扁平苔癣或毛囊障碍中那样出现了伤疤。

Diet. A low-protein diet or severely calorie-restricted diet can also cause temporary hair loss.

饮食。低蛋白饮食或热量严重受限的饮食，也会导致暂时性的脱发。