Picture of Alopecia Areata
Alopecia areata is an autoimmune condition that results in patches of hair loss. The immune system attacks the hair follicles resulting in baldness. Hair often regrows within 3 to 6 months. Sometimes, the hair that grows back in is white. Alopecia areata is just one type of autoimmune-mediated hair loss. Alopecia totalis results in full scalp baldness. Alopecia universalis results in complete hair loss over the entire scalp and body.
Text Reference: "Alopecia Areata." American Academy of Dermatology.