The GoodThe BadTheHot is correct. Men and women get hair all over their bodies, and because both sexes have testoterone ANY of those hair follicles can become androgen sensitive.
When this happens in girls/women if your cultural heritage is one of the ones not known for being hairy (like middle eastern, Hispanic, etc) it's almost always because of PCOS (polycystic ovarian syndrome) and is treatable.
You should talk with your doctor and get tested/monitored for PCOS because it comes with a host of other health implications for women.
I have PCOS and my symptoms started with the onset of puberty (when I was skinny as a rail) and have had to be monitored ever since. Do yourself a favor, just tweeze the hairs if they bother you, but make an appointment with your doctor too.