Necrotizing fasciitis is a bacterial infection that evolves rapidly and can endanger the patient's life.The occurrence of this condition is usually favored by the existence of some predisposing factors, more frequently by the existence of a trauma in patients with a poor immune status, diabetes, renal insufficiency or in drug treatment. At the onset, the clinic may be non-specific, being associated with pain, edema and cellulitis up to necrosis with sepsis. Usually the diagnosis is based on clinical suspicion and is supported by the changes in the laboratory analyzes and the imaging examination. It requires prompt, aggressive surgical and pharmacological intervention. We present such a case, which, even in the absence of any apparent signs of initial severity, evolved fulminantly and required prolonged and aggressive surgical treatment until healing.