Around last year I noticed that the area around my anus, and vagina are a lot darker than my nornal skin tone. I have a while skin tone, and the areas affected are several skin tones darker. I ve noticed they have a purple hue to them almost as if bruised. Also, the discoloration is more noticeable around my anus, i notice it a little on the outside of my vaginal lips. I do shave that area and I do normally get razor burn, or that was what I believed it to be, so recently I ve stopped shaving. I m not sexually active, but I do masturbate. Is this normal for a teenager (I m 16)? If not should I speak to my doctor about this?