It sounds like a freakish ailment from a horror movie: Sores erupt on your skin, mysterious threads pop out of them, and you feel like tiny bugs are crawling all over you.

• 那听起来像恐怖片里的怪病：皮肤出现溃疡，溃疡处有古怪的线状物突出，患者感觉像全身被小虫咬。