A member asked:

I've had a rash which only comes out when i'm in direct sunlight for a period of time.its like lumps under my skin which become very irritable ?

A doctor has provided 1 answer

Multiple causes : There are many rashes that fit your symptoms including solar urticaria, polymorphous light eruption, variants of lupus, photosensitive drug reactions, and other possibilities. See a dermatologist while the rash is active for a potential biopsy and workup.

Answered 5/28/2013

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