He was sitting on the bottom of his cage this morning and when he is turning around he turns his neck either to the right or left but in a 180 degree way. Also he jumps around and kind of flies but when he does he either hits him self on the cage or he just grabs on the cage. One more thing is i let him out the cage for a bit and when i grabbed him he made like a clicking noise also when he was on the ground he was closing his eyes. I just saw that he is standing up but like i said when he turns he turns his neck alot.
You should take him to the veterinarian to be examined, as it could be a viral or bacterial infection, or hypovitaminosis among other possible diagnoses. Once diagnosed, the veterinarian will prescribe an appropriate treatment.
All the best.