That’s right – all that is needed for this crazy new challenge is a pinch of salt and an ice cube. So, what have people been doing with the salt and ice that has caused doctors to become so concerned?
To start with, people have been putting salt directly onto their skin. This in itself doesn’t cause any damage, of course. It’s when the ice is added to the salt on the skin that something dramatic happens.
When you put ice onto salt, it creates a something called an “eutectic frigorific mixture.” This, in simple terms, means that it becomes crazily cold – sometimes as cold as 0° F.