Have you noticed that one of your legs feels shorter than the other? Do you limp slightly when you walk, or experience persistent back pain, hip pain, or knee pain that no amount of physiotherapy seems to fully resolve? You may be living with Leg Length Discrepancy (LLD) — one of the most overlooked causes of chronic musculoskeletal pain in adults and children.
At The Rehab Street, we specialise in the accurate assessment and non-surgical leg length discrepancy treatment in Delhi and Gurgaon — using custom shoe lifts, heel raises, orthotic insoles, and gait rehabilitation to correct the imbalance, relieve pain, and restore symmetrical walking for patients across Delhi NCR.
What Is Leg Length Discrepancy (LLD)?
Leg Length Discrepancy is a condition in which one leg is measurably shorter than the other. This difference — which can range from a few millimetres to several centimetres — affects how your pelvis, spine, hips, and knees align and load during every step you take. Over time, even a small discrepancy of 5–10 mm can cause significant secondary problems throughout the body if left uncorrected.
LLD is classified into two types:
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Structural (True) LLD — An actual difference in bone length between the two legs, caused by congenital conditions, childhood growth plate injuries, fractures, bone infections, or previous orthopaedic surgery
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Functional LLD — The legs are anatomically equal in length, but muscle tightness, joint stiffness, pelvic obliquity, or scoliosis creates the appearance and mechanical effect of a shorter leg
Both types cause real biomechanical consequences and both respond well to orthotic management when correctly assessed and treated.
Causes of Leg Length Discrepancy
LLD develops from a wide range of causes across all age groups:
✔ Congenital conditions — Present from birth; one limb did not develop to full length
✔ Growth plate injuries — Damage to the growth plates in childhood disrupts normal bone growth in the affected leg
✔ Bone fractures — Improper healing or shortening of bone fragments after a fracture
✔ Hip or knee replacement surgery — Subtle length changes can occur during joint replacement procedures
✔ Bone infections or tumours — Affect bone growth or cause structural bone loss
✔ Polio or neurological conditions — Paralysis in one limb reduces bone growth on the affected side during childhood
✔ Muscle contractures — Tight hip flexors, hamstrings, or IT band create functional pelvic tilt mimicking a short leg
✔ Scoliosis — Lateral spinal curvature creates uneven pelvic loading that functions like LLD
Symptoms of Leg Length Discrepancy
LLD does not always cause obvious limping — many people have compensated for the difference so effectively over years that they no longer notice it. But the consequences accumulate silently in the joints and spine. Common symptoms include:
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Uneven gait or subtle limping — one side lands harder or the hip drops on one side
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Pelvic tilt — one hip sits higher than the other when standing
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Chronic lower back pain — especially one-sided, often diagnosed as muscle strain without improvement
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Hip pain — particularly on the side of the longer leg due to increased loading
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Knee pain — both on the shorter leg (from compensation) and longer leg (from overloading)
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Shoulder asymmetry — one shoulder appearing higher than the other
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Foot and ankle problems — flat feet or overpronation developing more severely on the shorter leg side
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Scoliosis or spinal curvature — secondary to long-term pelvic obliquity
How The Rehab Street Diagnoses Leg Length Discrepancy
Accurate measurement is the foundation of effective LLD treatment. At The Rehab Street, our assessment goes far beyond a simple tape measure:
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Clinical measurement — Direct measurement from the anterior superior iliac spine (ASIS) to the medial malleolus on both legs
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Functional assessment — Observation of standing alignment, pelvic level, and spinal curvature
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Gait analysis — Walking assessment to identify the degree of Trendelenburg gait, hip drop, and compensatory trunk movement
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Foot pressure mapping — Identifies how the discrepancy is affecting loading across both feet
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Footwear assessment — Worn shoe patterns often reveal which side is being overloaded
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Review of X-ray or imaging — Where available, imaging provides precise bone length measurements
This comprehensive assessment allows us to determine both the type and magnitude of the discrepancy — and prescribe the precise correction needed.
Leg Length Discrepancy Treatment at The Rehab Street
Custom Shoe Lifts and Heel Raises
The most direct and effective treatment for structural LLD is a custom shoe lift or heel raise — a precisely measured elevation added to the shoe of the shorter leg to equalise standing height and walking mechanics. Unlike off-the-shelf heel pads, our custom lifts are:
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Measured to the exact millimetre based on clinical assessment
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Fabricated in appropriate materials — firm EVA, leather, or cork depending on the required height
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Designed to fit inside the shoe (internal raise) or added to the outsole (external raise) depending on the degree of correction needed
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Gradual in their correction — we typically start at 50–75% of the measured difference and increase over 6–8 weeks to allow the spine and muscles to adapt
Custom Orthotic Insoles
For functional LLD or cases where the discrepancy is accompanied by overpronation, flat feet, or abnormal foot mechanics, custom foot orthotics are prescribed alongside or instead of a heel lift. Our custom insoles correct the foot-level biomechanics that contribute to pelvic obliquity and functional leg length inequality.
Customised Orthopedic Footwear
For larger discrepancies — particularly those above 2 cm — the shoe itself may need to be modified or custom-built. At The Rehab Street, we provide customised orthopedic footwear with built-in corrections for patients who cannot achieve adequate correction through insoles and lifts alone.
Gait Training and Rehabilitation
Correcting the leg length discrepancy mechanically is only part of the solution. After years of compensation, the muscles, joints, and nervous system have adapted to the asymmetric pattern. Our foot therapy and gait rehabilitation programme helps retrain walking mechanics, strengthen the muscles needed for symmetrical gait, and release the compensatory tightness that has developed on both sides.
Manual Therapy
Hip flexor tightness, sacroiliac joint restriction, and lumbar muscle imbalances are common secondary consequences of LLD. Manual therapy addresses these soft tissue and joint restrictions — restoring mobility and reducing pain alongside the orthotic correction.
How Much Leg Length Difference Needs Treatment?
This is one of the most common questions we receive. As a general clinical guide:
DiscrepancyTypical Recommendation
Less than 5 mmUsually no treatment needed — monitor only
5–20 mmCustom heel raise or orthotic lift — first-line treatment
20–40 mmCustom shoe modification + orthotic + gait rehab
Above 40 mmCustom orthopedic footwear + possible surgical referral
Every case is individual — the degree of symptoms, the patient's age, activity level, and rate of secondary complications all influence the treatment decision. We assess each patient independently rather than applying a generic threshold.
Frequently Asked Questions — Leg Length Discrepancy Treatment
Q: Can leg length discrepancy cause back pain?
Yes — this is one of the most common and most overlooked causes of chronic lower back pain. Even a difference of 5–10 mm creates pelvic obliquity which causes the lumbar spine to curve laterally to compensate, loading the facet joints and discs asymmetrically over thousands of daily steps.
Q: How is a shoe lift different from a regular heel pad?
A custom shoe lift is fabricated to a precise measurement based on your clinical assessment. A standard heel pad from a pharmacy is a generic size that cannot be calibrated to your specific discrepancy. For discrepancies of 10 mm or more, a custom lift is essential — a generic pad will not provide the correct correction.
Q: Can leg length discrepancy cause knee pain?
Yes. On the shorter leg side, the knee often overpronates and compensates by inward rotation — causing medial knee strain and patellofemoral pain. On the longer leg side, the knee may hyperextend slightly or bear greater impact load. Both mechanisms lead to progressive knee pain that does not fully resolve until the underlying length difference is corrected.
Q: Is surgery needed for leg length discrepancy?
For most functional and mild to moderate structural LLD, non-surgical treatment with custom orthotics, shoe lifts, and rehabilitation is entirely effective. Surgery — such as epiphysiodesis (growth plate arrest) in children or bone lengthening procedures — is considered only for larger discrepancies (typically above 4–5 cm) or in cases where conservative management has failed.
Q: How long does it take to see improvement with a shoe lift?
Most patients notice meaningful reduction in back pain, hip pain, and limping within 4–8 weeks of consistent shoe lift use. Full adaptation — where the spine, pelvis, and muscles have fully adjusted to the corrected alignment — typically takes 3–6 months.
Q: Can children be treated for leg length discrepancy at The Rehab Street?
Yes. LLD in children is managed carefully — correction is introduced gradually, and devices are reviewed and replaced as the child grows. Early treatment in children is particularly important to prevent the secondary scoliosis and hip problems that develop when LLD is untreated through the growth years.
Why Choose The Rehab Street for LLD Treatment in Delhi & Gurgaon?
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✔ Precise clinical measurement — not estimates — before every prescription
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✔ Custom shoe lifts and heel raises fabricated in-house to exact millimetre
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✔ Custom orthotic insoles for associated biomechanical issues
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✔ Customised orthopedic footwear for larger discrepancies
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✔ Gait rehabilitation integrated with orthotic correction
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✔ Experience treating LLD in adults, children, and post-surgical patients
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✔ Serving patients from Delhi, Gurgaon, Noida, Faridabad, and across NCR
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✔ No referral required — direct appointment booking available
Book Your Leg Length Discrepancy Assessment Today
Get expert, personalised LLD treatment at The Rehab Street — Delhi NCR's specialist foot and ankle orthotics clinic.
📍 Delhi Clinic: H-13, near Balwant Rai School, Greater Kailash 2, Masjid Moth, New Delhi – 110048
📍 Gurgaon Clinic: C-616, Sixth Floor, Nirvana Courtyard Market, Sector 50, Gurugram – 122018
📞 Call / WhatsApp: +91-9354919385
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