The article presents a case study concerning a 58-year-old man with an abrupt, de novo and erythrodermic eruption in 2002. It notes that the said eruption has been exposed to sulfur mustard during the Iran-Iraq war in 1987. It mentions that a complete blood count has shown leukocytosis, atypical lymphocytosis and eosinophilia. It cites that causative relationship between sulfur mustard gas exposure, immune and cutaneous T cell lymphoma compromised state with opportunistic infection.