I have acne on my upper arms. A lot of people would say that might be karotosis pilaris but I don't think it is because they're not big, hard bumps on my skin, they're little bumps on there that look like a zit and I've been fighting it for a long time. I use tazorac on my arms to help make it peel but I don't think I should do it very often because its been making my skin completely raw. I have no idea what to do. My dermatoligst gave me this Cera Ve moisturizing stuff to help with it but it doesn't really do anything. I'm a 14 year old girl suffering and I want help so bad! Is it keratosis piloaris? Some of the zits are way bigger than others but its all over my upper arms! Any advice?