This is a two-step treatment that uses both Levulan, a topical solution, as well as laser light therapy. This procedure can be used to treat pre-cancerous lesions, actinic keratosis, sun damage, and also acne. Levulan is first incubated on the skin for 60 minutes and then light therapy is performed. There is major skin improvement one week after the treatment at our Cincinnati Dermatology office. Usually, three treatments spaced one month apart each are required for best results.