Phytophotodermatitis.

Phytophotodermatitis is a skin eruption resulting from the interaction of the sun's radiant energy and photosensitizing compounds found in various plants. Common offenders are celery, limes and certain oranges, as well as natural grasses. The acute phase of the skin eruption is characterized by edema and erythema. In the chronic phase, hyperpigmentation may develop at the contact site.