Why is my skin dry and peeling? help?

First, it started with my face like near my mouth, and now that i started putting cream on it, its gone. Then, my arms started getting dry so i'm still taking care of that. My legs were SEVERLY DRY AND WHITE AND PEELY, but i got rid of that, too. Now my chest, stomach, back, and neck are peeling.. like i rub it, and a bunch of white stuff falls off. It's kinda hard to apply cream on those areas though. Could it be dehydration?