The most common causes of O-legs can be divided into three categories: 1. Developmental factors In the period of physical development, due to malnutrition or intestinal diseases, calcium, phosphorus and other nutrient elements are lacking, resulting in bone development disorder, bone deformation or articular cartilage dysplasia, and genu varus changes. 2. Unbalanced factors Due to long-term bad posture or incorrect exertion habits, the muscles that dominate the joints are out of balance, which can lead to joint displacement and genu varus. 3. O-legs caused by trauma or other diseases.
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