Most Helpful Girl
It's normal for some people. Whatever you do, don't shave. You can try using bleach, it'll make it less noticeable. Sally Hansen works well. Another option is waxing, though it hurts like a bitch. If you really get fed up, there's always laser treatment, though you really shouldn't have to go to such extremes.
I'd say the best option is bleach, it'll lighten them. The biggest problem with putting bleach on your skin, however, is that while the product's on it's really really itchy and you'll have to just endure it for the 15-20 minutes required. Don't move or you'll make it worse, just sit still and listen to some really loud music, metal preferably. Make sure the shower's ready for you to jump in as soon as you can, no need to endure the torture for longer than necessary. Good luck, unfortunately it's the curse of dark hair, for girls anyway :/