When the calf is bent, the patient is likely to be in the state of X-leg or O-leg. When this happens, it is necessary to make a comprehensive evaluation according to the patient's age and signs, and then determine the treatment plan.

Generally, younger patients can be corrected by wearing braces. This kind of correction has great limitations and the effect is often poor, but it is suitable for young children. If the human skeleton is mature and conservative treatment fails, surgery can be used to solve it.

Femoral or tibial osteotomy can be used to correct leg curvature, which can achieve the goal of radical cure. Generally, dressing should be changed once every three days after operation, which will not affect the function of knee joint after operation.