patchy baldness

no one knows what activates alopecia areata .

没有人知道什么激活斑秃。

alopecia areata (mild - medium level) usually shows in unusual hair loss areas e. g. eyebrows, backside of the head or above the ears where usually the male pattern baldness does not affect.

斑秃（早期—中期）通常是在眉毛，后枕部或者是在头的两侧这些本不容易掉头发的地方狂掉头发。

alopecia areata is usually a temporary condition.

斑秃通常是一个临时的条件。

the other types of alopecia are alopecia areata , alopecia totalis , and alopecia universalis . universalis.

其他类型的脱发是斑秃，全秃，脱发。

a family history of alopecia areata increases one「s chances of developing it.

一个斑秃家族史增加了一个发展的机会。

hypothyroidism is an underproduction of certain hormones and is the most common cause of patchy hair loss known as alopecia areata (which can affect the whole body and not just the head).

甲状腺功能衰退癥就是某种激素分泌较少，这是头发脱落形成斑秃的最常见原因（这可能影响整个身体而不仅仅是头部）。

according to the national alopecia areata foundation, it affects five million people in the u.s. 「it could be stress or it could be environmental factors -- we really don」t know,」 dr. mirmirani says.

根据全国秃发基金会的数据显示，秃发影响到在美国的500万人。 马诺莫尼医生说：「至今我们不知道确切的原因，这可能是压力或者环境因素造成的。」

research indicates that genetics may increase a person's susceptibility to develop alopecia areata , as well as the degree of its severity.

研究表明，基因可能会增加一个人的发展斑秃，以及其严重性程度的易感性。

alopecia areata is classified as an autoimmune disease, although its cause is unknown.

斑秃是一种自身免疫性疾病列为，虽然其原因是未知的。

the extreme forms of alopecia areata are alopecia totalis, which involves the loss of all head hair, and alopecia universalis, which involves the loss of all hair from the head and the body.

斑秃最为极端的形式分为全秃，它指的是所有头发都会掉光； 还有普秃，它指的是头发还有身体上的毛发都会脱落。

the most common type of alopecia areata involves hair loss in one or more round spots on the scalp.

最常见的斑秃脱发涉及的一个或多个景点一轮的头皮上。

objective to investigate the related factors for alopecia areata in children.

目的探讨儿童斑秃发病的相关因素。