This case study discusses a 13-year-old girl diagnosed with a displaced Salter Harris II fracture of the proximal femoral epiphysis post reduction of a dislocated hip. Radiographs before reduction revealed a small fracture of the inferomedial femoral head. This, however, did not induce concern before reduction. The patient underwent reparative surgery of the epiphysis only to develop a collapsed femoral head, which was remedied through total hip arthroplasty. A decrease in blood flow, the delicacy in reduction, and unknown predispositions might have been contributing factors toward the unique development in this case.