The Hair Loss Encyclopedia
condition causing skin sensitivity to sunlight due to enzyme deficiency
Porphyria Cutanea Tarda (PCT) is a type of porphyria that affects the skin, causing it to become extremely sensitive to sunlight. This condition leads to blistering, itching, and swelling, primarily on sun-exposed areas. It is caused by a deficiency in the enzyme uroporphyrinogen decarboxylase, which results in the buildup of porphyrins in the skin.