It is a modern therapy used to treat actinic keratosis, which are precancerous lesions, caused by excessive sun exposition, and also some basal-cell carcinomas, which is the most common skin cancer. In some cases, it us used to promote skin rejuvenation and to treat acne, besides treating many other skin diseases.
Technique consists application of a cream on the area to be treated, for a time which lasts from 30 minutes to 3 hours, followed by a light application that activates the cream. Cream activation produces a reaction in the carcinogenic cells, destroying tumors and precancerous lesions. Photodynamic therapy can be used all over the body, but the most treated areas are face, scalp, neck, arms and upper trunk. It is a safe method with much superior aesthetical results than surgery and other skin cancer conventional treatments.