PicoSure 2 weeks post treatment, should I be concerned about a skin darkening?

I got a treatment done on 2 small spots on my face 2 weeks ago. The spots darkened and flaked off as expected. However, the area around one of my spots also flaked off and healed darker than my regular skin. So now there is a dark circle area surrounding the spot I was trying to treat. The other spot was pink but then healed darker than it was originally. Is this normal? Is there anything I should be doing?