How common is limping in limb length discrepancy?

When the legs are different lengths, the pelvis and spine may adjust during standing and walking. A person may lift the shorter-side heel early, bend the knee on the longer side, tilt the pelvis, or take an uneven step. Some differences cause little noticeable change, while others become clearer with fatigue or faster walking. An apparent difference can also come from pelvic position, joint stiffness, or muscle tightness, so measurement is needed before deciding on treatment.

Arrange an assessment if a limp is persistent or becoming more visible. A clinician may compare leg position, pelvic level, joint movement, and walking pattern, and may use imaging when the cause or true length difference is uncertain. Do not add lifts or inserts without advice; the correct approach depends on whether the difference is structural or functional. Physiotherapy may address strength, balance, flexibility, and movement habits.

Seek prompt review for a new or rapidly changing limp, pain after an injury, difficulty bearing weight, or new back, hip, knee, or foot pain. Get urgent help for severe pain, a deformed limb, numbness, marked weakness, or a cold or pale foot. In a child, a newly noticed limp, refusal to walk, fever, or night pain should be assessed without delay.

Ask whether the difference is structural or caused by alignment and muscle function, how it was measured, and whether a lift or physiotherapy is appropriate. Also ask which activities are safe, how to monitor the limp, and what new symptoms should lead to an earlier review.