I am a 25 year old female. 5'5" 138lbs. I have been noticing that I have several small, circular, tan-colored spots on my upper inner thighs and mons pubis. They are flat, not raised and are not painful. I do shave down there, but not in the areas where the spots are (I'm not that hairy). I have fair skin, so these spots aren't DARK, but they are darker than my pale skin. What could this be and what should I do?