Hi Michelle! Hyperpigmentation is a common issue I treat in my studio and there are multiple ways of addressing it based on certain factors: cause (acne related, sun damage, melasma), depth, duration and amount (of hyperpigmentation).
I almost always recommend that we do some LED treatments in order to lift that melanin (pigment) from the pigment cell, start breaking it up and move it closer to the surface where we can then begin to work on exfoliation.
Microdermabrasion is an excellent mechanical exfoliation - but unless that pigment is sitting right at the surface of the skin, it's not going to help with the dark spots.
Great question and I hope I've helped! ~Gigi
Nov 30, 2012