My mother's medications have made her furrier than she used to be, but billybob may be right--you (and your hairdresser, who was probably looking at you in harsh flourescent lighting) may be the only one who notices. Dad and I (I'm a girl) both have bushy eyebrows, anyway, so Mom still looks pretty hairless to us even when she's griping that she looks like Sasquatch. Which is not to say you shouldn't do something if it REALLY bothers you, only that it may not be as big a deal as it seems.

Mom gets her eyebrows--which are still much more sparse than mine--and "moustache" waxed off every once in awhile. I can't imagine paying somebody to dab me with hot wax and rip out my hair, but it makes her feel better about her appearance.