Heel valgus may be related to ankle valgus deformity, malunion healing after heel fracture and so on. 1. Ankle valgus deformity: flat foot deformity, insufficient strength of the leg and ankle joint, irrational exercise pattern, calcium deficiency at an early age, all these factors are the causes of ankle valgus deformity. 2. Deformity healing after heel fracture: heel fracture without surgical treatment, especially comminuted fracture, will also have valgus deformity after deformity healing. In order to clarify the cause of exostosis of the heel bone, it is necessary to improve the examination to determine the cause of the disease, for young children or preschool children, the appearance of exostosis of the heel bone deformity should attract enough attention.