Hyperpigmentation from CO2 laser. How long will it take to fade? (Photo)

To answer your question - it may take ANOTHER 6 months before fading completely. I would use SPF+++ at least 3 times a day, and use a bleaching cream, say 8-9% HQ for 6 weeks or so. Progressive photographs, like the ones you have taken will show that every month that goes by, PIH or darkening improves. I usually avoid treating stretch marks in sunexposed areas with Fractional CO2, as PIH, just like yours, in your skin type, is common. All the best, Dr Davin LimLaser Dermatologist, Brisbane.Australia.