I fell down the stairs

Oh, my god! You got a bruise on your knee.
절언, 무릎에 멍 들었네?
What happend?
어쩌다가?

I fell down the stairs yesterday.
어제 계단에서 넘어졌어.

So, Are you OK?
괜찮냐?

Yeah, I'm OK. It stings a little bit though.
ㅇㅇ, 좀 쓰라리지만...