Are you new to exercise or have you recently increased intensity? I remember getting them whenever I get back on the treadmill after having been off it for a few months. I think traditional advice is that you have to just work thru it and in a few days it will subside. Also if you are working on an incline on a treadmill, lower it until the pain subsides. Make sure you are wearing new, cushioned shoes (not your old walking around shoes that you've had 2 years) and take it easy. I've heard that icing down will also help, but the thought of that in the winter is not too appealing!
Good luck with them!