The femur is what we commonly call the thigh bone, the bone between the hip and the knee, divided into the femoral head, the femoral stem and the distal femur, the femoral head and the hip bone form the hip joint, the lower femur, the patella and the tibia form the knee joint, it is the longest bone in the body, and also the bone that carries the most weight, and also the bone that is most easily injured. If femoral pain occurs, there are many reasons for it. Depending on the location, the pain is different. First, we have to rule out any transfer from other parts of the body, such as lumbar intervertebral discs and spinal stenosis in the lumbar region, which can also cause femoral pain and thigh pain, and also rule out problems with the femur itself, such as fractures and tumors, and then rule out any problems with the hip joint, degenerative hip joint, necrosis of the femoral head, and then rule out any problems with the knee joint, The problem of the knee, knee osteoarthritis, patellofemoral arthritis, synovitis, etc. can cause this pain, and when this pain occurs, we must go to a specialist hospital for proper examination and treatment.