Femoral neck fractures have an average chance of necrosis of 22%, and the variation in occurrence is mainly related to factors such as fracture site. The probability of necrosis with collapse in displaced femoral neck fractures is about 16-30%, while the rate of necrosis of the femoral head due to undisplaced femoral neck fractures is about 8-15%. Factors that affect fracture healing also affect femoral head necrosis, such as subtrochanteric fractures with significant displacement, excessive internal and external reduction, delayed surgery, and internal fixations that occupy more space in the femoral head can increase the incidence of femoral head necrosis. The main reason for this is that young adults have a higher bone quality and often require greater violence to cause a femoral neck fracture, and the accompanying blood circulation disruption is naturally more severe.