livia has the story. >> reporter: meet daria.e lots of teens, she plays soccer, a musical instrument, and can text as fast as she talks. but in one way she's very different. unlike everyone else in her family, and unlike most kids, daria has had no hair since she was a very little girl. >> when i was 14 months old, i was losing my hair, and we went to a doctor, and they told us to go to like a hair specialist and they said i had alopecia. alopecia is a hair loss disease. >> there's three different types of alopecia. there's alopecia areata, there's alopecia totalis, and there's alopecia universalis. daria has universalis, which is the most severe case of alopecia. >> reporter: that means a childhood, and possibly a lifetime without hair, eyebrows and eyelashes. and it means dealing with people who think she might be seriously ill. they associate hair loss with cancer treatments. daria has learned to explain that she feels just fine. >> alopecia doesn't really make a difference. it's just hair. >> people do have a tendency to look