Dear Doctors: I am a healthy 23-year-old woman. I started noticing extra hairs in my brush, and then my mom found two bald spots on the back of my head. I did a telehealth appointment and they said it’s alopecia areata. What is that? Does the hair ever grow back? Will it happen again?Dear Reader: Alopecia areata is a chronic autoimmune disorder that results in hair loss, ...