phototoxic contact dermatitis, a rapidly appearing, sunburnlike response of areas of skin that have been exposed to the sun after contact with a photosensitizing substance. Hyperpigmentation may follow the acute reaction. Coal tar derivatives, oil of bergamot (often used in cosmetics and beverages), and many plants containing furocoumarin (cowslip, buttercup, carrot, parsnip, mustard, and yarrow) are known photosensitizing materials. Treatment includes Burrow’s solution, emollient creams such as Acid Mantle, and topical corticosteroids.
