Help with keratosis pilaris?!

I'm almost 16 and as long as I can remember I've had these ugly bumps all over my body, especially on the back of my forearms, and all over my legs and calves. When you scratch them a white substance comes out that was clogging the poor and the hair that was clogged uncoils. I'm guessing that it's keratin and from the research I've done I think I have keratosis pilaris, however I haven't found many useful tips for someone my age. My parents don't seem to be taking me to a dermatologist anytime soon even though I am begging them since I also suffer from severe eczema on my ankles. I am tired of having this ugly skin and covering up my ankles and my body. Can any dermatologists (or anyone) give me tips, treatments, or products that I can buy from a store easily without a prescription? Thank you!