My birthmark it's de same, but in the left side. Yes, after my second session, I observed dark and redness in my skin. I think it's temporary, because a days after my first session, my birthmark became more light. Then, I'm waiting... I read that the laser "destroy" the melanine and the body will absorve it. This process it'snt fast I think... Good luck for you in your first procedure! It's so good change experiences, this forum help me a lot, mainly to feel that I'm not alone.