Sunscreen allergy and its investigation.

Allergic reactions to sunscreens are relatively rare. However, as the public become more conscious of the dangers of excessive sunlight exposure, the use of sunscreens is increasing. They are also being incorporated into general cosmetics on a more frequent basis. Sunscreens contain a variety of potential sensitizers which may lead to contact and/or photocontact allergic dermatitis, and as pharmaceutical companies continue to manufacture and incorporate new UV filters it is crucial that we remain up to date and aware of these agents to include in patch and photopatch testing batteries. Furthermore, the creation of a European consensus statement regarding methodology in photopatch testing has enabled greater standardization and comparison of patch test results across centers.