Photocontact dermatitis is a term that describes a reaction of the skin caused by a topically applied substance followed by exposure to UV-A radiation. There are 2 categories of photocontact dermatitis: photoallergic and phototoxic reactions.5 Photoallergic reactions are cell-mediated type IV reactions that require prior sensitization and occur only in susceptible individuals. In contrast, phototoxic reactions do not require prior sensitization and can occur in any individual if given sufficient exposure to a photosensitive chemical followed by sufficient UV-A radiation. Berloque dermatitis is classified as a phototoxic reaction. In phototoxic reactions, the cell membrane and the DNA of epidermal cells are damaged, causing erythema, edema, inhibition of DNA synthesis, inhibition of cell proliferation, and stimulation of melanin production.6 In the acute phase, photocontact dermatitis can appear as erythematous patches, plaques, vesicles, and bullae, which may resemble severe sunburn.5 Postinflammatory hyperpigmentation follows. Pigmentation usually fades after many weeks to months; however, the hyperpigmentation may become chronic if application of the offending substance continues.