How effective is custom orthotics for limb length discrepancy?

A leg-length difference may come from the bones, the position of the pelvis, or a functional change in the foot and hip. An orthotic may support the foot or provide a lift inside the shoe, helping reduce uneven loading through the ankle, knee, hip or lower back. It cannot correct a bony difference by itself, and a large or uncertain difference should not be corrected by guessing the lift height. Symptoms and walking pattern matter as much as a measurement.

Have the difference assessed while standing and walking, with attention to the pelvis, hips, knees and feet. A clinician can decide whether a full-length lift, a partial lift or another orthotic design is appropriate. Introduce the device gradually and use it in stable, well-fitting footwear. Report new knee, hip or back pain, pressure under the foot, or a feeling that your balance has changed. Learn more about [Custom Orthotics](/treatments/non-surgical-orthopedics/custom-orthotics/).

Seek prompt assessment after an injury that changes your walking, or with sudden severe pain, inability to bear weight, progressive weakness or new numbness. Book a review when symptoms continue despite the device, when the lift feels unstable, or when one shoe becomes difficult to tolerate. These findings may indicate that the measurement, diagnosis or treatment needs revisiting.

Ask whether the difference is structural or functional, how it was measured, what correction is appropriate, and how quickly to increase wear. Ask when your gait and symptoms should be checked again.