This does sound like what is known as a photosensitivity reaction. The problem is that sometimes a suntan lotion can cause the same kind of reaction. As it is important to know what is the cause of your son's reaction it would be worthwhile consulting either a paediatric allergist or a dermatologist.In SA there is also a high incidence of a genetic illness called porphyria which can also start off with a photosensitivity reaction.
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