Purpura fulminans is a severe and rapidly progressive septic process characterised by the development of haemorrhagic and ecchymotic lesions and skin necrosis. It can appear on any part of the body but predominantly affects the limbs. Purpura fulminans is a rare but possible complication in paediatric patients, especially neonates. It can increase their risk of morbidity and mortality if not treated early and cause a severe long-term condition in survivors of the infectious episode, including amputation. For professionals involved in wound healing, purpura fulminans poses a major challenge. This report describes the case of a premature neonate with extensive purpura fulminans of the legs and arms. Topical treatment of the limbs and purpuric areas with hyperoxygenated fatty acids (HOFAs) every two hours produced an improvement in the lesions. Complete healing was achieved using moist wound healing products. Early topical application of HOFAs appears to be a safe treatment that improves tissue microcirculation in paediatric patients with Purpura fulminans, minimising sepsis-related skin damage.