Over the course of maybe the past year i've lost most of the hair from my calves and shins on both legs. it is not due to friction. any possibilities?

See below: There are several reasons for hair loss on the legs. Poor circulation may be a factor, which can be caused or aggravated by diabetes, thyroid disorders, peripheral artery disease, medications, poor diet, lack of exercise, smoking, being overweight, and other health issues. To properly diagnose your condition, and to rule out a serious condition, you need to be evaluated and tested by a physician.