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Necrotising fasciitis is a severe, life-threatening soft tissue infection. It produces an extensive cellulitis with severe involvement of subcutaneous tissue, fascia, muscle or both, resulting in necrosis of the tissue. All age groups, including neonates, can be affected. Patients with necrotising fasciitis present with more severe constitutional symptoms and have a poor outcome, unless aggressive antibiotic therapy and surgical debridement are instituted promptly. The debridement of necrotic tissue is imperative to control the infection, but results in deep wounds that require further treatment. In this study, the neonate was treated with alginate dressings and negative pressure therapy after resolution of cellulitis, with excellent results and no untoward events.