Unraveling the Mystery Behind an Extraordinary Sunburn

An 80-year-old man developed a rare condition known as solar urticaria, which causes an allergic reaction to sunlight. Initially misdiagnosed as a photodermatitis, the man's symptoms included redness and itching whenever his skin was exposed to the sun, even through windows. A biopsy confirmed the diagnosis, and the man was advised to use sunscreen, take a higher dose of antihistamines, and wear protective clothing. Solar urticaria can be dangerous, with extensive sun exposure potentially triggering severe reactions or even anaphylaxis.