Adults who have had varicella zoster virus (VZV) infection may experience the unusual consequence of necrotizing fasciitis (NF), which is brought on by a secondary bacterial infection. The optimum approach to treat this medical condition is with a precise diagnosis, quick antibiotic therapy, and immediate surgery. We present 36-year-old case of post chickenpox NF in an immunocompetent male adult patient by diagnosing clinical and laboratory investigations