Question
My 6 year old son's neck pops every time he nods it up and down.  Does any one know what might have caused this, and if it something I should be conserned about

Answer
Hello, Rachel.

That's a bit unusual, for someone his age.

Usually, popping in the neck results from tight muscles, the usual consequence of a fall or injury.

Here's an article on whiplash injuries that may or may not be relevant to your son's history:  see somatics.com/page4.htm.

with regard,
Lawrence Gold