“I can't stand the sun. It burns me,” was a seventy-eight-year-old man's complaint. We thought this would be just another case of photosensitivity due to medicine he was taking. But, that is not how it turned out.
For many years he had completely avoided sunlight, because even being in the sun for a few minutes made his exposed skin itch and burn and turn bright red. It was no ordinary sunburn, which takes hours to develop, but was virtually immediate. By going indoors the reaction would pass in about an hour, leaving no trace. He had never been outdoors long enough to know how severe a burn he might develop.
His history disclosed that he had had an adenocarcinoma of the colon excised two years ago. Otherwise, he had always been in good health. He had no known allergies nor did he smoke, drink, or take a single medication. His family history was noncontributory. His contactants included Dial Soap, shaving cream, after-shave lotion, baby shampoo, and a hair colorant.
He had found sunscreens and antihistaminics of no help. Physicians had tried a number of prescriptions without success.
On examination his skin was normal, but when we sent him outdoors for ten minutes of exposure to the February sunlight, he returned with extremely red skin over his hands, face, neck, and scalp, which burned and itched severely. He remained in our office for the afternoon while his symptoms and the redness abated.