I did the ice and salt challenge and after 4 days it left a red mark. Does anyone know what to do to clear it up or what cream to put on it?
You have frostbite.You couldn't have...looked up why the challenge is bad or anything?It makes ice colder, and cold enough, to give you frostbite.There is nothing you can do, the dead skin will eventually fall away.
What is ice and salt challenge
You need to visit a doctor as soon as possible so that he/she can prescribe the correct medication for you. In the meantime, you can use some Benzoyl peroxide, mild cleanser, or Oil-free moisturizer. Read more from http://www.livestrong.com/article/259090-how-to-treat-blemishes-red-spots/.