The medical term for hair graying is canities. Hair turns gray (or white) when your hair follicles stop creating melanin. Melanin is the substance that gives your skin and hair color.
also characterized by round patches of hair loss. Alopecia totalis. This type of alopecia areata causes hair loss on all or nearly the entire scalp. Alopecia universalis. In this rare type of ...
Alopecia areata is an autoimmune disorder affecting millions of people that causes patchy hair loss, most commonly on the the scalp. Tisdale opened up about how she managed cycles of hair loss and ...