I don't think it's fleas. We just fought a battle against them in our house, and if you had them, every mammal in the house would be itching miserably. you should see my poor bit-up ankles! And my poor cat was miserable. I got them frrom visiting this friend of mine who has a bunch of cats running around. You'd see tiny jumping black things on your clothes and body whenever you sat for more than five minutes, lol.

I never had mites on my snakes, but I had a tick problem that was somehow overlooked and led to the ticks breeding (which shouldnt happen if you remove the big ones just after you buy a snake, but apparently we missed one tick, and Bam...) Preventamite does wonders on ticks, and should knock those mites out fast. Good luck!