This is the major weight-bearing bone in your lower leg, and it's the most commonly broken long bone in your body...... Causes of a broken leg Common causes of a broken leg include: Falls. Falling can fracture your femur...
It usually takes quite a bit of force to break the bones of the leg...cause a bone to break if the bones have been weakened by disease such as cancer or other tumors, bone cysts, or osteoporosis...