Photodermatology. Quo vadis?

Erythema was not always a good parameter for acute solar damage and is much more difficult to use in darker skin types. While in the past photodermatology was mainly focused on Caucasian skin, the future, therefore, could be completely different. In addition, skin colour has not only a protective importance but also a social importance. This is another factor that should be taken into account. Photodermatology and the classification of photodermatoses will also become more globalised in the future. Challenges for phototherapy will be a reduction of the irradiation time and the number of treatments, and the development of specific light sources for specific indications. Phototesting should be standardised on an international level and this will lead to a growing need for an International Society for Photodermatology. Until now, most treatments have been rather symptomatic. There are also more and more reasons to believe that more active treatments could play a role in the future.