This is my foot. This is my foot on Sorafenib. This is called hand foot syndrome. Toxicity to the drug has built up, and causes the capillaries in the extremities to burst. It feels like huge hot spots. Then it feels like you’re walking on feet where the skin in a wee bit loose and you’re sliding around in your own feet. Then it seems to be callousing up. Good times. These little piggies are not doing to the market today. Pedicure anyone?
cancerrant 
I don’t know if you are allowed to take any drugs to help HFS since you are in a trial, but Celebrex has been helping me deal with increased trouble from my own chemo drug (Xeloda). Might be worth asking about. I wish you well, this is nasty business indeed. I did write a post about the Celebrex and HFS, you can let me know if you are interested in reading it, I don’t want to force anything on you.