Strangely enough, my leg cramps happen most often when I awaken in AM and do the in-bed stretch. This stretch seems to be a bit out of my control and while I can stop it, it seems to have a mind of its own -- this is when the cramps hit on the outside of my ankle and in my feet. I can't tolerate gabapentin but do take Vit B12 (oral supplement). Feet are most comfortable when cold (icy cold!). I notice when I don't drink enough water, the cramps are more severe. I have the type of PN where my feet are hyper-sensitive - feel everything - even bathmat causes discomfort. I've had this level of discomfort since chemo 6 years ago. It never improved but did get more severe. I've kind of divorced myself from traditional testing as it seems painful with no indication that the tests will result in help... so I take my tylenol, keep my feet cold, and alternate between swearing and praying.