I don't know why it just hit me to ask this question, but I noticed a problem this past winter. I didn't get to get out and ski much with the crappy winter, but every time I'd take my first run or two I'd get horrible pain up the side of my left leg. It started at my ankle and went up the left side of my calf. I tried to ski through it the first two times, but it just feels like the blood is getting stopped at my ankle and building up causing pressure and my leg starts to burn and feel really fatigued in the calf. I had a grade II sprain in that ankle at the end of the 2010 season.
I am not sure if that is contributing or not because I had only skied those boots twice before the sprain and there was a lot of toe box blowout work that was done between my last day on the slopes and the sprain so I can't definitively say if it is the ankle or related to the boot or something else.
If I take my foot completely out of my boot and put it back on its fine. If I just unbuckle the straps on the lift and move my foot around the pain doesn't go away. It is still there even when sitting on the lift. I ended up just planning to take one run and go back to the lodge to take off my boot and put it on the last few days. After I would remove it and put it back the pain went away and stayed away in that leg.