How to get my kitten to stop bitting so hard?

I 100% understand what you are talking about with the biting. When I got my kitten Lilly, she was 5 or 6 weeks old. She was very sick when we got her. I spent over 2 thousand dollars while our crappy old vet tried to figure out what was wrong with her (skin scrapings, fungal cultures, lime sulfur baths meds) etc., until we got completely fed up when she came home and all of her fur had been been burned off from too much sulfur being used in the sulfur bath (see link below for my insider-pages review of this horrible vet) and with being used for our money that we took her to a new vet, who looked at her and knew on the spot what was wrong with her. So I sympathize with you. Anyway, she used to bite a lot, and hard. She'd chase my hair then chomp down on my ear, and draw blood. Same with my toes, and fingers and my wrists. I learned to simply make a loud 'Ppsst' noise then pull her away. After a few weeks of doing this, she learned its not ok to bite. It'll also get better when she looses her baby teeth, bc then her new teeth wont be quite as needle sharp. Its cute at first when she plays and bites, then looks at you with that cute little kitten face, but it gets old really fast. Shes about 9 months old now and she nibbles, but doesnt bite. Shes become a lot gentler. At night when shes laying on me and I move she'll nibble or nip at my fingers but its so gentle it doesnt bother me because I know she means no harm at all. I really hope this helps, just knowing that someone had and is going through the same thing, and I sympathize with you in every aspect of this situation :-) *my review is the very top first review on the page titled "Run for your money (And your pets life)!"