How big are you?
Do you mean the stubble, or do you mean something else? I've seen women's shaved armpits from time to time that seem discolored where the hair would be - I wonder what causes that. If you're talking about <i>that</i> then I've thought it could be that they used a dipilatory and that dicolored their skin, or that that skin was very sensitive and tended to lighten, or that there was some other irritant. If you're talking about "five o'clock shadow" in the pits, then there's probably not much you can do about that, except maybe to use a dipilatory, or have something done professionally.
u freak. Maybe u jst need a better razor
Actually, i'm not so big. I'm 14 (I didn't say that before because I know how people usually don't like the 15 and younger crowd.) ..and i'm about 5'4 and 105 lbs. Anyway, after I shave there, it's always hairless, no stubs or anything, but theres still this darkish color there that from far away, it looks like its hairy. I use deoderent daily, and I have no idea whats causing it.
Keep your arms down.
I have the same issue. Waxing helps, but then you have to let your pits grow out for a long time. Bleaching does NOT help. Try shaving with a better razor and using a mild exfolliator first.