Even at his young age, he could be experiencing the pain of arthritis. There are so many possibilities, I would strongly advise you to ask him to see a GP and get a referral to a specialist.
Hope this helps.
is there any Arthritis in the family?
hip pain might be caused by many things but i personally lean to kidney problems ...
I've been pushing him to see a dr, but he's been skeptical... I'm going to keep trying.
thanks for the help! :)