Why does my sun burn itch SOOOO much?

I have to work in an hour! I got a sun burn on my shoulders, it doesnt seem that bad but all of a sudden today it got extreamly itchy literally to the point im crying. I can't scratch it because it hurts soo bad! I put alo vera on it but it didnt help the itching! IT'S SO ITCHY, and it's NOT peeling HELP ME I have to work soon and im so uncomforable! What can I do to relieve the itching!!!!!!???????????