Replying to Full Tilt Leg Pain

At the beginning of the season I got a pair of Full Tilt Dropkicks and just recently they have been causing a lot of pain. When I tried them on in the shop they were very comfortable and that is why I thought they were the boot for me. I have very skinny legs however so I have been trying to adjust for that by buckling down the boot very tightly. I don't know if it is shinbang or what but whenever I ski park in these boots they start to kill my lower legs. After every jump, my shins hurt very badly and on the lift I notice my calves hurt a lot too. Is there anything I can do to fix this without getting new boots?