I have idiopathic polyneuropathy, thought to be hereditary since I was born with congenital foot deformities (probable Charcot-Marie-Tooth). I read on a podiatry board that caffeine can be significant in impairing circulation in the feet. I gave up caffeine about six months ago. I had no hair on my toes at that time, but it is regrowing on the larger toes. I'm concerned about the redness of my toes, and that is how I happened to find this thread.