Sometimes, especially during the teen years, you have a spurt of uneven growth; your bones grow a little faster than the muscles attached to them and you get what's called "growing pains". But it should wear off; if it doesn't, if the pain continues for a couple months, I'd see a doctor. If it IS arthritis, the sooner you know, the sooner you can work against it. There are, besides pain meds, exercises to keep joints flexible.
9 months ago
Last edited at 1:11PM on 3/10/2013
How long has this been going on? Have you been exercising lately? If so, maybe you pulled a muscle in one of your legs and therefore standing hurts. This pain can actually last a while, depending on how severe the injury is. Or perhaps you fell asleep with one of your legs in a funny position. If it has been going on for a long time and the pain is getting any better, then you should definitely go see a doctor.