Are Dark Marks from V Beam Permanent?

I had V beam laser on my legs for small veins. It has been 3 weeks and each area that was zapped is still very dark and bruising.

I am caucasian and light skinned, but I do tan easily. My doctor says that the marks will go away with time, but I am worried. Can they be permanent? What can I put on them to help them go away?

No doctor answers yet