Besides what you are trying to show in the picture, I think you

来源: HenryLi 于 2019-02-25 12:24:53 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (133 bytes)
回答: 去年夏天我后背右侧也长了一个。慎入 由 fuz 于 2019-02-24 10:15:57

have TINEA VERSICOLOR, a form of superficial fungal infection of the skin.  But it could also be pityriasis alba

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