In extreme cases artificial lighting at work can also contribute to continued persistence of the eczema. [ncbi.nlm.nih.gov]

A photoallergic reaction generally presents as an eczema (also called dermatitis ) confined to the areas in contact with the responsible chemical and exposed to the sun. [dermnetnz.org]

Occasionally, however, persistent hyperpigmentation develops. In these cases laser therapy (Rubin laser) can help. Photoallergic dermatitis Photoallergic reactions occur, unlike phototoxicity, only if a specific sensitization has been acquired. [ncbi.nlm.nih.gov]

Their differential diagnosis is problematic not only because of similar phenotypes, but also because of confusing nomenclature and classification. [ncbi.nlm.nih.gov]