Hip dysplasia is the medical term for a hip socket that doesn't fully cover the ball portion of the upper thighbone. This allows the hip joint to become partially or completely dislocated. Most people with hip dysplasia are born with the condition.
Doctors will check your baby for signs of hip dysplasia shortly after birth and during well-baby visits. If hip dysplasia is diagnosed in early infancy, a soft brace can usually correct the problem.
Milder cases of hip dysplasia might not start causing symptoms until a person is a teenager or young adult. Hip dysplasia can damage the cartilage lining the joint, and it can also hurt the soft cartilage (labrum) that rims the socket portion of the hip joint. This is called a hip labral tear.
In older children and young adults, surgery may be needed to move the bones into the proper positions for smooth joint movement.