Why does one leg feel longer after a THR?

It is not uncommon to feel as though there is a difference in leg lengths after hip replacement. Most of the time this is a perceived difference that will settle out over a few months. Because of cartilage loss in the hip joint, your pelvis gradually tilts as an accommodation. During surgery, your leg is immediately restored to its normal position and length. Because your pelvis is tilted, it then feels like one leg is longer than the other. As you begin walking with your new hip, your pelvis will gradually reposition itself. Wait at least three months post op before making a final judgement on leg length. During this time, don’t use any lifts in your shoes, as that will just keep your body from readjusting itself normally. In addition to pelvic tilt, the feeling of leg discrepancy can be attributed to tight muscles or arthritis in the spine. Most cases resolve with stretches, exercise, and time. In the rare situation of a true difference, a shoe lift may be prescribed after 6 months or more. But for most people, no treatment is necessary and your legs will eventually feel normal again.