why does ice an salt burn?

I put salt on my arm and put an ice cube on it and I do it all the time but me and my friends were being stupid and I put it right on the other side of my elbow and it turning purple and it hurts really bad but it has only been one day so I don't know so I'm wondering if it is like bad or if it...

Well, last week my friend showed me a scar from where she has burned herself with salt and ice, and this scar is hardly noticeable, and I have no blemishes anywhere what so ever, and I wanted a scar somewhere, so I pored salt on my arm and pressed an icecube on it, I couldn't really tell that there...

About four days ago my friend, Dale, showed me a burn he got from his brother. His brother had put salt on his arm, and placed an icecube on it for about a minute. He told me to do it. So, my friend Fallon & I did almost the same thing, except we dipped the entire ice cube bottom in a bag of...