I had twitching in my whole leg, one-sided restless leg syndrome. Have your iron levels checked. I started taking an iron supplement a couple of months after my sleep doc tested and indicated that I had sub-optimal results for my age on labs. My iron levels are increasing and the RLS has diminished a lot. Also, check for new guidelines regarding iron and ferritin levels in elderly folks. The low end of the normal range should be higher for us.