Don't fret. It's not really removing melanin pigment. There is something on the surface of the skin that is being ablated by the Nd:YAG laser and it's not affecting the skin pigment. The reason I know this is that the mole near the nostril gets hit by the laser and there is no change in color on it but the coating around it goes away. Yes lasers can do this sort of thing, but there would be a visible whitish layer left behind after the laser ablates the melanin if it was actually being absorbed by it. The wavelength of the Nd:YAG or Nd:Glass laser is 1064 nm and it doesn't affect skin like this. You would need something closer to the 500 nm wavelength to have melanin be affected but that would be a bright green laser output.