Femoral neck fractures are classified based on displacement and stability. Undisplaced or valgus impacted fractures are stable and best treated with internal fixation using cannulated screws or a dynamic hip screw. Displaced fractures in elderly patients have a high failure rate with internal fixation and are best treated with joint arthroplasty. Younger patients are better candidates for internal fixation due to more reliable results compared to arthroplasty. The prognosis depends on the amount of displacement, with undisplaced fractures having a better prognosis.