Asymmetry of thigh skin pattern refers to the asymmetry of the inner and posterior thigh patterns in children who have both legs straightened and aligned, with inconsistent pattern depth, length and position. 3 months old children who only find asymmetry of leg pattern may have short lower limbs compared to adults and unbalanced fat distribution, which will gradually disappear with growth and development, so parents need not be too nervous. If children have asymmetrical hip and leg lines, they may have hip joint restriction, bilateral thighs that cannot be separated, asymmetrical separation and unequal length of both lower limbs, which is a clinical manifestation of developmental hip dysplasia, and need to go to the hospital in time to avoid delaying treatment. Parents need to take their children for regular child health checkups in time, avoid wrapping the child with candy-like wraps, keep the child’s legs in a natural state to observe the skin and hip pattern of both legs, and suggest using froggy holds to avoid candy holds. For girls born in breech position, congenital hip ultrasound screening is routinely recommended to rule out congenital hip dysplasia.