Thigh inversion and calf outversion belong to the manifestation of X-legs, mostly seen in teenagers, which means that when standing naturally, the knees can be together but the ankles can’t be together, and it is mainly corrected by conservative correction and surgical correction. 1. Conservative correction: If the X-leg pattern is not very serious, but only a slight phenomenon, the X-leg pattern can be corrected gradually by wearing customized orthopedic shoes, shifting the center of gravity, and letting the muscles of the outer thighs get relaxed. 2. Surgical correction: However, if X-leggedness is more serious, especially if the bones are already shaped, the effect of purely conservative correction methods is not good, and surgical correction is often needed. When X-leggedness occurs, you should cooperate with your doctor to correct it as soon as possible.