Hello! Welcome to you and your bird. What is it's name? Where I work we have an Indian ringneck and he does the same thing. There are two things that could be happening. Best case he's just playing but even if he's playing it still hurts. Do you have earrings in perhaps? They loooooove earrings. Weirdly enough he could also be afraid of your ear you never know with birds really. If he keeps biting put him on a perch immediately but never shut him back in his cage. Good luck! I hope you found this helpful