Livedoid and gangrenous dermatitis is a rare posttherapeutic accident, produced by intravenous, intramuscular or intra-arterial drug injection under an oily or suspension form. It was first described by Stefan G. Nicolau in 1925 after injections of bismuth. The progression of the disease is favorable most cases are cured after 6–8 weeks. We present a clinical case of a patient aged 74 years.