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Is there a term from the field of dermatology and cosmetics that you do not understand? Would you like to know what it means? View the full definition from the La Roche-Posay glossary.
Phototherapy consists in exposing the patient to radiation (UVA, UVB) in order to treat some types of chronic inflammatory skin disorder that do not have treatment solutions, such as psoriasis. The UV rays have a deep-reaching immunosuppressive effect, which is capable of inhibiting hypersensitivity reactions that are responsible for the skin disorder.