this could be "shin splints" . google that - it should give you professional symptoms and treatment :) hope this helps
As a runner in high school I witnessed this as well -I described this as air in my bones - not a good feeling
When did it start? I had this problem in both legs when I started going to college. My aunt who is a nurse said it was shin splints. It is from walking unaccustomed distances. It is very painful, I found that wearing high, tight socks helped. Mine lasted about 2 weeks.
Ive been getting that for years hurts alot too. It is called shin splints, I ride bike instead of walking too much.