My back is itchy.我背痒。

I've got an itchy nose.我鼻子痒。

an itchy wool sweater使人发痒的羊毛衫

After three months in one place I get itchy feet, I have to go to another city.在一个地方待了三个月后, 我便会脚底发痒, 必须前往另外一个城市。

If you have itchy feet, then you are unlikely to be fully satisfied in your job.如果你总想着跳槽, 那么你对工作不大可能完全满意。