Replying to Lower leg muscle pain

Hey! When i ski 2 or more days i get a pressure-sensitive pain in the muscle right above my ankle. its not shin bang (i know it to well). the muscle is located at the outer side of my lower leg muscle. this problem is not caused by backseat landings for sure. i didn't get pain as much in my old boots (spk kaos) as in my new ones (full tilt booter). The problem is that i can switch them again because of getting hard shin bang in the spks. after skiing 2 or more days i need nearly 1 week to rehab or more. have anyone in this forum similar problems? could the problem caused by the extrem soft flex of the full tilt? or the crap liner? what do you think. Sorry for my bad english.