Baby legs are very bent may be physiological factors, calcium deficiency, bone deformity, etc., if the baby is less than one year old does not need to do special treatment, if the baby is more than one year old can be corrected by orthodontic tape, calcium and surgical methods. 1. Physiological factors: babies within one year of age generally do not need to do special treatment of leg bending, with the growth and development can be gradually corrected. 2. Pathological factors: (1) Calcium deficiency: babies over one year old with very bent legs may be caused by calcium deficiency, which can be properly supplemented with calcium supplements under the guidance of doctors, such as calcium carbonate and calcium gluconate, etc., and corrected with orthodontic belts, which can achieve corrective effects through continuous immobilization. (2) Bone deformity: if the baby has very serious bone deformity of the lower limbs, or has epiphyseal related lesions, this situation needs to consider osteotomy surgery, or can also repair the epiphysis of the lesion. If you find that your baby’s legs are very bent, parents should take your baby to the pediatric department of a regular hospital as soon as possible for examination and standardized treatment according to the cause of the disease.