When you find that your baby’s hip line is not symmetrical; your baby is not very willing to do what you have to do to spread your legs apart; when you change your baby’s diaper, you hear a loud popping sound in your joints. When you get to the toddler stage, but your baby is not very fond of walking, when your baby walks, one foot is always stacked on the other, when your baby walks, one sway is like a small duck; your baby’s two lower limbs are not equal in length, according to your baby’s age, if 1 or 2 conditions occur in your baby’s body, you should consider whether he is hip dislocation, moms and dads should not take it lightly. The incidence of congenital hip dysplasia is more common in female babies, the incidence of breech birth is higher than that of cephalic birth, and the incidence of cesarean birth is higher than that of normal birth. Especially for heavier babies born by cesarean section, these information can also be referred by mothers and fathers. The early diagnosis and treatment of congenital hip dysplasia is very important. 3-6 months old babies can be fixed in special slings after a clear diagnosis, and more than 95% of them can be cured after 3 months, and this treatment method does not damage the joint and has few complications. For children over 2 years old, surgery and a cast are required, and children between 4 and 7 years old must undergo surgery to heal. The younger the child, the better the result; the older the child, the more traumatic the surgery and the worse the result. If a hip dislocation develops and is not treated, it can lead to a disabled leg, a limp, and when the child grows up, the leg cannot be stressed and he or she will feel sore when walking.