Rhabdomyolysis following pneumotic tourniquet use is an extremely rare complication. In this case report, we aimed to present an unusual tourniquet complication following proximal tibial osteotomy. A 55-year-old female patient was operated on for genu varum in our clinic. Postoperatively, an anuria developed, and liver and kidney function test levels increased. The patient was diagnosed with acute rhabdomyolysis, and an aggressive treatment was begun.