Fractured neck of femur knee pain may be caused by limited knee movement, peripheral nerve injury, soft tissue injury and other factors. 1. Knee joint activity limitation: falling while standing or walking may lead to femoral neck fracture. Patients with femoral neck fracture may suffer from hip pain, lower limb deformity, and restricted movement. Restriction of lower limb activities may lead to adhesion and atrophy of the ligaments and joint capsule around the knee joint, thus causing knee pain. 2. Peripheral nerve injury: some patients with femoral neck fracture may be complicated with peripheral nerve injury, when the fracture end presses the sciatic nerve, or presses the femoral nerve, radiating pain may appear around the knee joint, which is manifested as knee pain. 3. Soft tissue injury: If the skin or muscle of the knee area is injured at the same time during the fracture of the neck of femur, soft tissue injury may be induced. Symptoms such as localized swelling and pain may manifest as knee pain. There are more reasons leading to knee pain of femoral neck fracture, it is recommended to identify the cause in time. Standardized treatment under the guidance of the doctor.