Did you get this snake from a pet store by chance?
Don't panic, they are nasty but you can deal with this. Here's a couple of links to help you understand....
Know your enemy!
http://www.vpi.com/publications/the_...of_snake_mites
Where to buy Provent-A-Mite (follow directions on the can EXACTLY, it does NOT go directly on the snake)
http://www.pro-products.com/miteandtemp.html
Snake mites have a 30 day life cycle. If you don't deal with them they will be back.