title: Bath psoralen might cause burns.
abstract: Patients undergoing PUVA where the psoralen is added to bath water might be at risk of phototoxic burns, researchers say. The problem has been seen in three patients undergoing the treatment in Dundee. One woman had a painful red line on her neck and chin which corresponded to the level of water in the bath. Another woman had burns to her back, while a man was affected on the shoulders and arms.