Typically “bow legged” is a structural thing that will not change without surgery. However, if you are not having pain or limitations in activities, and it is just a cosmetic thing, there would likely be no need to have surgery. Of course, consult with your medical provider about this. If you are having pain or limitations in activities, you could try conservative actions first, such as physical therapy. Despite not being able change the look and shape of the legs, physical therapy should be able to help with improving pain and function.