Had Levulan treatment for pre-cancers. How soon can I try it again?

Impossible for us to comment without photos. Some areas of solar damage maybe concentrated in areas, whilst skip areas can occur. PDT then activates the ALA or the active chemical that was placed in the treated area. Bottom line, we do not know the clinical indication, nor the lesion or field ...

Most severe reactions are because of one of two things: There was too much UV exposure after the light OR the sun damage on your face is very severe. I think that this is a great option for you but you may be better off at first with either a shorter incubation time or less...

PDT causes oxidation and this results in inflammation of the skin and controlled cell death, this means that skin peeling is commonly seen. This will settle in a few days. All the best, Dr Davin Lim. Brisbane. Australia.