Photodynamic Therapy PDT. Will 2 or 3 Sessions Be Effective?
I'm a bit confused about PDT. What I don't understand is how deep UVB/A damage goes into the skin and if PDT is capable of dealing with all these previously damaged cells within in a few sessions? Will two or three sessions of PDT (one hour with cream and time under a red light) kill all sun damaged cells that presently exist on my face? If I was never to see the sun again, would I not need any more PDT? Or will old damaged cells come to the surface anyway and need to be treated at a later date?