疥疮，学名疥螨。表皮的皮损可表现为小隧道，通常出现在手上，有时也会在其它地方,并且沿着隧道发痒。这些损害因为发痒经常被抓破。
This is a scabies mite. The official name is Sarcoptes scabiei. These little critters burrow in the epidermis, usually on the hands but sometimes elsewhere, and produce itching along the linear burrows. These lesions are often excoriated because of the itching.
