GLOSSARY

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.

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Photosensitisation

Photosensitisation, which is an increase in the skin's sensitivity to UV radiation, is often due to a chemical substance or medicinal product. It appears as a rash. Photosensitisation may have no known cause, be induced by an external (perfume) or internal (medicine) trigger or be of genetic origin.

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