There are three types of femoral neck fractures according to the location and characteristics of the fracture: 1) subtrochanteric fractures, where the fracture line is basically at the intersection of the femoral neck and the head of the femur; 2) transcranial fractures, where the fracture line passes through the entire femoral neck and is located lower than the subtrochanteric fracture; 3) fractures at the base of the femoral neck, where the fracture is close to the trochanter. The purpose of the distinction is to determine the chance of necrosis of the femoral head and non-healing of the fracture. The closer the fracture line is to the femoral head, the greater the chance of necrosis of the femoral head and non-healing of the fracture, because the fracture will also have a huge impact on the blood circulation inside the bone, slow healing and necrosis will easily occur.