The longest bone in the human body is the femur, commonly known as the thigh bone, which plays an important role in supporting the body. There are 206 bones in an adult, the longest of which is the femur, the thickest long bone in the human body, which is located in the femur and plays an important role in supporting the body. The upper end of the femur consists of the head of the femur and the acetabulum, which together form the hip joint. The femoral neck is the connection between the head of the femur and the stem of the bone, where most hip fractures occur. The lower end of the femur is enlarged, and the medial and lateral condyles of the lower end of the femur can be felt on the surface of the body. The lower end of the femur and the proximal end of the tibia form the knee joint. In addition to femoral neck fracture, there are also femoral head necrosis, femoral intertrochanteric fracture, femoral diaphysis fracture, etc. If you have the above mentioned diseases, you need to go to regular orthopedic clinic in time for the next step of examination such as X-ray, etc., and then you need to be treated under the guidance of the doctor according to the results of the examination to clarify the condition and its severity.