挠痒痒的英文是 "itch". 它的来源可能来自于古代拉丁语 "ictus"，意为"刺，抓"。

例句：

"I have an itch on my arm." (我胳膊上有痒。)

"Itchy skin can be caused by a number of things, including dry skin, allergies, and insect bites." (痒皮可能有许多原因，包括皮肤干燥、过敏和虫咬。)