Dana brings up a fair point about the rabbit’s age, and I’m curious to know his/her background as well, in addition to any advice you received from rabbit-experienced vets.
Being so small, a part of this can be that your rabbit does not realize your hands are a part of you. This goes with your neck and all other body parts. They don’t have eyes, nor any indicators of intention, and they don’t move like a typical animal, so it’s sort of natural for these things to spook a rabbit and he/she may nip or bite at it in precaution. Dana’s advice on squealing can help try and instill to your rabbit the hand is a part of you. Similar to puppies and play-biting, feedback is needed to let the animal know what’s too hard of a communication signal.
You are a very large being, and rabbits have a big blindspot in front of them, so especially for a small rabbit, mapping the whole human body can be challenging.
The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.