[問題] 如何區分跳蚤咬、蝨子叮、毛囊炎？

[geofrania (三葉蟲)]

下列三種狀況要如何用肉眼辨別？

1.跳蚤咬

2.蝨子叮

3.毛囊炎

例如：

http://ppt.cc/N2vQ

是1、2 or 3？

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