Male pattern baldness, medically known as androgenetic alopecia, refers to hair thinning in an “M-shaped" pattern that is typically mentioned when men talk about balding.

男性型脱发，医学上称为雄性遗传脱发，就是人们谈论秃顶时常提到的头发逐渐减少，呈“M型”状态。

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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。

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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。

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