The femur, or thigh bone, is the longest and strongest bone in the body. Because of its strength, breaking it usually requires a significant force, such as a car accident, a major fall, or a high-impact sports injury. A fracture in the shaft (middle portion) of the femur is a serious injury that almost always needs hospital care. In adults, femur shaft fractures are rarely treated without surgery because the bone needs to be held in perfect alignment to heal properly.

The most common surgical method is intramedullary nailing—a metal rod inserted into the hollow center of the bone, secured with screws at each end. This provides stability while allowing some early movement. In some cases, especially if the fracture is near a joint or the bone is in multiple pieces, plates and screws may be used instead. After surgery, patients usually use crutches or a walker while gradually putting more weight on the leg over several weeks. Full healing often takes 3–6 months, and physiotherapy is essential to restore strength, movement, and walking ability.

Watch video of Subtrochanteric Hip Fracture

In children, femur shaft fractures can sometimes be treated with a spica cast (a body cast that extends over one or both legs), especially in younger children. Older children or those with unstable fractures often need surgery using flexible rods or plates. Children heal much faster than adults—often within 6–10 weeks—and usually regain full function with minimal long-term problems.

Possible complications include delayed healing, differences in leg length, infection after surgery, and knee or hip stiffness. Following medical instructions, attending physiotherapy, and avoiding high-impact activities until cleared by the doctor are important for a smooth recovery.