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What is PUVA? PUVA or photochemotherapy is a type of ultraviolet radiation treatment (phototherapy) used for severe skin diseases. PUVA is a combination treatment which consists of Psoralens (P) and then exposing the skin to UVA (long wave ultraviolet radiation). It has been available in its present form since 1976.
Pus is a general term for a collection of thick, often white fluid that accumulates around the source of an infection. The medical term for pus is purulence, or purulent drainage. Pus can be alarming because it often signals that presence of an infection.