The contracted ligaments and tendons (such as the Achilles tendon), from a histological point of view, although they are both composed of collagen fibers, the collagen fibers of the ligaments are wavy with many cells and easy to pull and lengthen (especially in infancy), while the collagen fibers of the tendons contain few cells, and the fibers are not wavy, so they are harder to be stretched, and the ligaments are easy to pull and lengthen to make We can massage, plaster, or brace orthopedic fixation, is the theoretical basis for the deformed foot to obtain correction. Horseshoe inversion foot inversion inversion deformity, mainly for the contracture of the ligament is the main, and foot drop Achilles tendon contracture plays a decisive, through the cast or brace orthopedic fixed foot inversion inversion to obtain correction, if still continue to add force to correct foot drop, often ligament overdraw, and Achilles tendon is not satisfactorily lengthened, so often formed flat foot or rocking chair foot deformity, and for Achilles tendon contracture, if the subcutaneous tendon cutting, surgery small, the The effect is good, the heel droop inversion can be orthopedic, walking painlessly after healing, I hope parents can understand, not overcorrected, so as not to form another deformity of the foot.