Originally Posted by Ryza
take a glass bottle and roll it up and down your shins a bunch of times. do it so it kinda hurts but not that bad. do it every night and eventually you'll have no feeling in your shins and they'll be very conditioned
A friend of mine doing muay thai suggested the same to me, but he used a plastic bottle filled with water and put in the freezer. Said something about the cold athropying the nerves. Haven't tried it myself since I didn't start muay thai afterall. So second hand info, but might work.