blow your nose

blow /bləʊ/ v. (风)刮，吹;(用嘴)吹气

blow out the candles 吹蜡烛

to force air from your lungs and through your nose to clear it

擤鼻子

You can also blow your nose when you are sick.

当你生病的时候你也可以擤鼻子。

What do you blow your nose with when you've got a cold?

你感冒时用什么擤鼻涕?