Asymmetric leg lines in babies may be normal physiological asymmetry or congenital hip dysplasia, which needs to be taken seriously. Most babies have symmetrical leg lines, but some newborns have physiological leg line asymmetry due to obesity, etc. If the leg development is normal, this is only a temporary phenomenon and can gradually improve. However, asymmetrical leg lines may be a sign of congenital hip dysplasia, so you can check whether your baby’s hip lines are symmetrical. For babies over 6 months of age, the diagnosis can be made through ultrasound, and for babies over 6 months of age, the diagnosis can be made through X-rays because the bones are calcified. Babies diagnosed with hip dysplasia should be treated promptly to avoid affecting bone development. Early stages of the disease can be corrected by wearing braces, such as split-legged froggy hold or fixed in an abductor froggy cast; for older children with more serious conditions, surgery is recommended.