Thanks for the great information! My mother always had dark armpits so I thought this was a genetic thing but my sisters don't have them--only me! After reading your list, I see that one reason could be that while growing up, I sweat more than they did.
Do you know of any commercial products to lighten the skin?
Also, I have waxed in the past but stopped because I noticed I was getting "chicken skin" where the hair follicles popped out.
I still do have chicken skin. Do you know if there is anything I can do about this?