J.L.
Yes. My brother-in-law and step-niece (his daughter) do the same thing - face squishing, rapid blinking. He told me he had it looked at when he was a kid and there was nothing the doctor could do. It's been going on since he was small and he's not on regular medication for anything. It showed up in his daughter when she was 5. I don't know if she was taken to the doctor about it or if they accepted it as genetic.
If I were you I'd take him to the doctor just in case, but it's probably really just a tick that he can't control. I would definitely not be punishing him for it or try to make it stop unless it's doctor's orders.