A practical guide to the causes, warning signs, and treatment of genu valgum — from bracing to corrective surgery — for families in Yavatmal and Central India.
By Dr. Prashant Kasare, Kasare Hospital
Knock knees, medically termed genu valgum, is a condition where the knees angle inward and touch while the ankles remain apart when a person stands with legs straight. Mild degrees of this alignment are extremely common in toddlers between ages 2 and 5 and usually correct on their own as the child grows. However, when the inward angulation persists beyond age 7-8, worsens over time, or is markedly asymmetric between the two legs, it warrants a proper orthopaedic evaluation. As a practising Orthopaedic Surgeon in Yavatmal, I see a steady number of children and adolescents at our Shivaji Nagar clinic whose parents are simply trying to understand whether this is 'in the genes' or something that needs active treatment.
The honest answer is: it depends on the type. Physiological genu valgum, seen in young children, is a normal developmental phase and is not inherited in a specific pattern — it simply reflects the natural growth sequence of the lower limb. Hereditary or developmental genu valgum, on the other hand, can run in families and is often linked to:
Genetic growth-plate disorders affecting the distal femur or proximal tibia
Skeletal dysplasias and inherited metabolic bone conditions
Familial tendency toward asymmetric growth-plate closure
Rickets or vitamin D-related bone softening in childhood, which can have familial nutritional patterns
Post-traumatic or post-infective growth-plate injury on one side, occasionally mistaken for a hereditary pattern within a family
Parents with a history of knock knees, particularly if it persisted into their own teenage years, should have their children screened proactively rather than waiting for symptoms to appear.
Tip: Measure the gap between the ankles while your child stands with knees touching — a gap greater than 8-10 cm after age 7, or one that is increasing over 6 months, should be assessed by an orthopaedic specialist rather than monitored at home.
Beyond the visible inward angling of the knees, look out for an awkward or waddling gait, frequent tripping, knee or ankle pain after activity, unequal shoe wear on the inner sole edge, and visible asymmetry between the two legs. In adolescents, unaddressed genu valgum can contribute to anterior knee pain, patellar instability, and — over years — accelerated wear on the outer compartment of the knee joint, a pattern that can predispose to early osteoarthritis in adulthood if left uncorrected.
Diagnosis starts with a careful clinical examination — measuring the intercondylar and intermalleolar distances, checking gait, and assessing limb length. Standing full-length X-rays of both legs (hip-to-ankle) are the gold standard, as they let us measure the mechanical axis deviation precisely and identify exactly which growth plate is contributing to the deformity. At Kasare Hospital, our on-site X-ray and diagnostic imaging facility means these films can be taken and reviewed the same day, allowing us to counsel families without the delay of an outside referral.
Treatment is always matched to the child's age, the severity of the angulation, and how much growth potential remains.
| Type | Typical Age | Usual Approach |
|---|---|---|
| Physiological genu valgum | 2-7 years | Observation, periodic review, footwear check |
| Pathological/hereditary genu valgum | 8+ years, or persisting/worsening | Guided growth (hemiepiphysiodesis), bracing, or corrective osteotomy depending on remaining growth |
| Adult-onset or post-growth deformity | Skeletally mature | Corrective osteotomy; joint replacement if arthritis has already set in |
For younger children with significant growth remaining, a minimally invasive guided-growth procedure (temporary hemiepiphysiodesis) can gradually correct the alignment as the child grows. For adolescents closer to skeletal maturity, or for adults with established deformity, a corrective osteotomy — surgically realigning the bone at a precise angle and fixing it with a plate — is often the more definitive option. This is also where our team's experience with arthroscopic (minimally invasive) surgery and complex fracture management becomes directly relevant, since osteotomy fixation uses the same precision plating principles.
To illustrate how surgical correction actually works in practice: we recently managed a 14-year-old girl with developmental genu valgum affecting her gait and knee comfort. After standing full-length X-rays confirmed the mechanical axis deviation originated at the distal femur, she was treated with a corrective medial closing-wedge distal femoral varus osteotomy, with the correction secured using a medial condylar fixation plate. This procedure realigns the femur at the exact angle needed to restore a normal mechanical axis through the knee, immediately reducing the abnormal load on the outer joint compartment. Cases like this underline why an accurate, individualised surgical plan — not a one-size-fits-all approach — matters so much in paediatric and adolescent deformity correction.
Recovery after a corrective osteotomy typically involves a period of protected weight-bearing, followed by a structured physiotherapy program to rebuild knee strength and range of motion. Bone healing at the osteotomy site is monitored with periodic X-rays, and most patients are guided back to full activity in a phased manner over several months. Our integrated physiotherapy support ensures continuity of care from the operating table right through to functional recovery, rather than leaving families to arrange rehabilitation elsewhere. This same rehabilitation philosophy applies whether the patient has undergone a knee-preservation osteotomy, a hip replacement surgery, or spinal correction.
Warning: Seek prompt orthopaedic evaluation if your child has a sudden increase in knee-to-knee gap, one-sided or asymmetric knock knees, persistent knee pain, a limp, or if the deformity is present after age 8 and is not improving. Delayed treatment can make correction more complex later.
Genu valgum in children and teens also frequently coexists with, or is confused for, other lower-limb alignment issues such as scoliosis and spinal deformity when posture compensation occurs, so a full musculoskeletal review is worthwhile rather than examining the knees in isolation.
Kasare Hospital in Shivaji Nagar, Yavatmal operates an International Standard Modular Operation Theatre — the first of its kind in Yavatmal and third in Central India — supported by on-site imaging and C-arm guidance for accurate osteotomy and fracture fixation. Our orthopaedic specialists in Yavatmal bring fellowship training in joint replacement, hand, and foot & ankle surgery, along with clinical experience at institutions including RML Hospital, AIIMS, and Lilavati Hospital, into every deformity-correction case we manage. With NABH-standard protocols, a dedicated IPD, in-house pharmacy, and 24/7 emergency services, families do not need to travel outside Yavatmal for advanced orthopaedic care.
If you have noticed knock knees in your child, or if you are an adult experiencing knee pain related to long-standing genu valgum, do not wait for the deformity to progress. Book a consultation with our orthopaedic team in Shivaji Nagar, Yavatmal for a thorough clinical and radiological assessment.
