I was reading some post on Black Girl With Long Hair and she posted about a beautiful Sistah who blogs about her experience and battle with Alopecia due to using chemicals, perms, weaves and dyes.
If you are thinking about going natural or if you are natural, but thinking of perming your hair again. PLEASE GO TO THIS SITE. Not to say that your hair will fall completely out if you use chemicals, but view this as a warning of something that could not only happen to you but to those we love.
Check out the site here