When some parents take their children for health care, they find that the doctor has to take down the child’s pants to look at his buttocks. When they find that the hip pattern is asymmetrical on both sides of the child, they are usually advised to take the child to a professional orthopedic surgeon to see if it is hip dysplasia. How can hip dislocation be related to hip asymmetry? Why is it important to have this test done on your baby? Developmental hip dysplasia, also known as hip dislocation in the past, is a common motor deformity in children. Depending on the severity of the condition, it can usually be divided into three degrees: total hip dislocation, hip subluxation, and hip dysplasia. The cause of hip dysplasia is still unclear, except for congenital factors, some acquired factors also play an important role, such as babies born hip-first, their chances of hip dysplasia will be higher than babies born head-first, in addition, in life, some parents are used to swaddle their babies too tightly, or use their arms to hold the child, so that the child’s legs This makes the femoral head and acetabulum not in a concentric anatomical position, which also easily leads to hip dislocation in babies. Hip dysplasia is a serious problem for children, and if it is not detected in time, the shaping ability of the affected bones will gradually decrease as the child gets older, so there will be different degrees of short and long legs, limp, limited hip movement, and arthritis in the joint in advance, affecting the child’s future life. Early detection and treatment of pediatric hip dysplasia is of great importance, and ultrasound screening is generally recommended for babies born breech, with a family history or clinical hip instability and other risk factors to rule out hip dysplasia. As parents, what are the early signs of hip dysplasia? The following characteristics may help you: 1. asymmetric hip pattern; 2. when the two ankles are close together, the knees are not equal in height and the lower limbs are not equal in length; 3. when the baby is lying down, the two hips and two knees are flexed to 90 degrees each, and when the thighs are separated by hand, they are very tight, and the amplitude of abduction cannot exceed 70 degrees; 4. when the baby is urinating or when the baby is moving the lower limbs, you can often hear a “thump”; 5. “5.Children who can walk alone always have a limp or swaying gait; 6.The hips are flat and wide, and the greater trochanter of the femur protrudes, and if both sides are dislocated, the hips are seen to shrug back and the waist protrusion increases. If the baby is found to have the above symptoms, then mom and dad should be alert and take the baby to the orthopedic department in time, once diagnosed, timely intervention is needed, if timely intervention can be obtained in the small infancy, it can stimulate the overall development and growth of the hip joint to achieve the original anatomical relationship between the femoral head and the acetabulum.