The hair follicles that grow in your pubic region are no different than the hair follicles that grow on your scalp, your face, and the rest of the body. For this reason, it would not be difficult to imagine that just like the rest of our hair, that the hairs in the pubic area would eventually turn white or gray. From the description you have provided, it is unclear whether you have noticed white hair anywhere else on your body or whether this is solely in your pubic region. Even though you are very young, it is important to remember that everyone is different and so some people have a tendency to get white hair at an earlier age. Family history can be a cause for early changes in one's hair color. Do you have any close relatives that had a change in their hair color at an early age? Of course, it would be best to be evaluated by your primary care physician
, because he or she will best be able to evaluate your medical history and presenting symptoms and decide upon the appropriate work up if deemed medically necessary, as well as possible treatment options if they are available.