Bent legs in babies may be due to normal physiology, inward or outward turning of the knee, congenital malformation and so on. There are different causes of bent legs in babies and different methods of correction. It is recommended to go to the hospital to find out the cause of the disease and then correct it. 1. Normal phenomenon: for babies within 1 year of age, leg bending is a normal phenomenon of physiological development, parents do not need to worry too much. This situation does not require special treatment, usually pay attention to nutrition, calcium, sunshine can be, as the baby grows older, will gradually return to normal. 2. Knee inversion or ectropion: if the baby is two years old, both lower limbs have not been straightened, you need to wear orthotics at night and corrective shoes during the day for treatment, if it is only mild, you only need to wear corrective shoes during the day, while severe knee inversion or ectropion requires surgical treatment. 3. Congenital deformity: If the baby’s legs are bent due to congenital deformity, it is recommended to go to the hospital in time to check the degree of deformity, according to the doctor’s guidance for treatment, and give the baby some calcium supplements or use orthotics or surgery for treatment. In addition, in daily life should pay more attention to follow the doctor’s advice to the baby calcium and vitamin D. At the same time, you can give the child to do corrective exercises, to avoid the child’s unhealthy sitting posture, walking posture, and so on.