Abstract Erythropoietic protoporphyria (EPP) is usually caused by autosomal dominant mutations in FECH: raised protoporphyrin levels cause itching, burning and erythema after sun exposure, with facial scarring sometimes liver damage. We report a child the much rarer X-linked form (XLDPP) consider reasons for his unusually severe features. A 4-year-old boy living India presented long-standing er...