From my experience he should have been released on a concussion noise and stress-reduction plan.
We even had to keep low lighting for a couple of weeks.
It is to prevent increased intercranial pressure until the skull heals. Swelling and a soft skull is bad ju-ju. Sneezing, blowing of noses and lifting are also no-no's.
Is it posible is was not an actual fracture, just a small compression?
I'd ask for a doctors note and a copy of the discharge instructions.