If a patient still has pain six months after a fracture of the neck of the femur, it may be due to infection at the neck of the femur, bone nonunion, or breakage of the internal fixation. 1. Infection at the neck of femur: If there is secondary bone infection or osteomyelitis at the fracture site, pain may occur at the fracture site. If the condition is severe, it may be accompanied by redness and swelling of the skin and soft tissue at the fracture site. Early CT and MRI examination of the fracture site is needed for diagnosis. 2. Bone nonunion: If there is bone nonunion, it will cause pain at the fracture site, especially when the limb is weight-bearing, the pain is very obvious, and X-ray film and CT examination should be carried out as early as possible to make a clear diagnosis. If it is true that the fracture does not heal or delayed healing, daily care and conservative treatment should be done. 3. Breakage of internal fixation: If the fracture has been operated and there is pain at the fracture, whether there is any internal fixation causing pain or not, X-ray examination is needed for early diagnosis and treatment. When the patient’s femoral neck fracture is still painful after six months, he should go to the hospital in time, clarify the cause of the disease, and standardize the treatment under the guidance of the doctor.