Abdominal Necrotizing Fasciitis Secondary to the Intramuscular Injection of Permethrin: An Uncommon Case Presentation.

Necrotizing fasciitis is a severe, rapidly progressing bacterial infection. We report a unique case in a 40-year-old woman with schizophrenia who developed necrotizing fasciitis after self-injecting permethrin intramuscularly into the lower abdomen. The patient presented with abdominal pain, fever, and a fluid collection on computed tomography. Surgical debridement and antibiotic therapy were performed, resulting in a favorable clinical evolution. The case suggests that permethrin induced local toxicity and tissue damage. Early diagnosis, prompt surgical intervention, and prevention of toxic substance misuse are essential.