As I understand Purpura is normal after pulsed dye laser treatment but my child had done grey spots instead, why? (photo)

July 31, 2015
Asked By:fyrfytrlady in Cuyahoga Falls, OH

My 5 son has a port wine stain that is treated with a pulsed dye laser at 8 jules. He went for his 3rd laser treatment yesterday and instead of all of the area treated turning purplish (like with the previous treatments) he has some specific spots that are grayish which has not happened with any of the other laser treatments. Why the difference? Should I be worried? What specifically causes some of the areas to turn purple, yet some of the areas right next to it to turn gray?

2 photos