Necrotizing fasciitis (NF) of member is an extreme medical and surgical The prognosis appears to berelated to several clinical, paraclinical and therapeutic factors.Our work is a retrospective study based on the use of 8 cases of necrotizing fasciitis members over a period of four years from January 2010 to January 2014 patients treated and followed for surgery osteoarticular B4 CHU HASSAN II Fez. The goal is to bring the epidemiological, clinical and laboratory, scalable, and demonstrate the value of intensive early surgery in the therapeutic management of this condition. Our series is characterized by a mean age of 55, 62 years, female gender was predominant with a rate of 62.5%, a slight predominance of lower limb relative to the upper limb, and diabetes is the condition the most common because it is found in 50% of cases. A large inflammatory and hyperalgesic member and skin changes associated with systemic manifestations is the typical clinical presentation. The imagery has a secondary role and should not delay taking load deep FN, whose life depends on early treatment. The treatment is essentially the surgery.Trimming, debri dement and necrosectomy were the most interventions practiced in this study. A second look was necessary in in 37.5% of cases. Antibiotic therapy in an adjunct to primary treatment. Finally, the prognosis is closely related to the field, severity of initial clinical presentation and specially precocity and quality of care diagnosis and treatment seems quite satisfactory in our series. This explains the mortality rate is about 25%.