What can cause chronic leg stiffness and pain?

Variety of things. Your evaluation would look for causes that my come from joints, bones, circulation of the neurologic system. How it is influenced by activity is a clue to its cause.

Related Questions

What can cause someone to have chronic leg stiffness and pain?

See Pain Specialist. You may need this worked up to see why you have such significant pain by your PCP initially and then possibly a pain specialist. Could be sciatica, DVT, compartment syndrome, etc... Hard to say without evaluations. Read more...