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A 41-year-old member asked:

What causes photosensitivity rash?

1 doctor answer2 doctors weighed in
Dr. Ally-Khan Somani
Dermatology 20 years experience
Many causes: Causes for photosensitivity) can be classified into 1) those caused by the presence of an underlying skin condition (eg., lupus); 2) chemicals/drugs topical or ingested which are photosensitizers (eg., tetracyclines, dyes); 3) genetic diseases (eg., xeroderma pigmentosa); 4) metabolic disorders (porphyrias) and 5) idiopathic (unknown).
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Last updated Jun 14, 2022

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