Necrotizing fasciitis is a rapidly progressive and life threatening infection of the fascia, with secondary necrosis of the skin and subcutaneous tissues. The causative organisms are commonly polymicrobial including both aerobic and anaerobic. Aim of the study was to identify the predisposing conditions. 30 cases of necrotizing fasciitis admitted in a teaching hospital in Kerala, India were prospectively studied. Of the 30 cases studied, 22 were above 50 years old. 9 were female and 21 males. In 19cases lower limb was involved, in 6 cases scrotum and perineum and in 3 cases abdomen was involved.18 cases were having diabetes mellitus and hypoalbuminemia was present in 13 case. In our study of 30cases, diabetes mellitus and hypoalbubinemia were identified as the most common predisposing factor associated with occurrence of necrotizing fasciitis.