Symptoms of Developmental Dysplasia of the Hip
DDH usually affects only one side of the body, most often the left. Babies usually don't feel any pain and don't show any obvious symptoms. To diagnose it, doctors look for these signs:

at birth, an audible "click" or palpable "clunk" during routine newborn checkups

different leg lengths

asymmetry in the fat folds of the thigh around the groin or buttocks

after 3 months, asymmetry in the motion of the hip and obvious shortening of the affected leg

in older kids, an exaggeration in the spinal curvature that may develop to compensate for the abnormally developed hip

limping in older children