Polydactyly is one of the most common congenital deformities of the foot in children, manifesting as a deformity of the foot with redundant toes, with an incidence of approximately 2 per 1,000, which may be related to genetics and environmental pollution. Diagnosis Diagnosis is relatively simple and relies on physical examination, but X-ray examination is often required to clarify the presence of redundant metatarsals with redundant toes forming the joint. Treatment The main treatment relies on surgery. Surgical treatment requires removal of the redundant toe and reconstruction of an adjacent toe that is normal in appearance and function. The main consideration is to reconstruct a normal toe web and to reconstruct the stop of the lateral collateral ligament of the preserved toe in a delicate manner to minimize trauma and postoperative scar formation. Particular attention should be paid to the fact that when preoperative radiographs suggest that there is a redundant metatarsal bone that forms a joint with the polydactyly, the redundant metatarsal bone must be removed at the same time. Surgery is often performed around one year of age.