Overview
About Bow Legs (Genu Varum)
Bow legs (genu varum) describe an outward curve of the legs at the knees and are extremely common and entirely normal in infants and toddlers up to around age 2–3, usually correcting on their own as the child grows. Persistent, worsening, or asymmetric bowing beyond this age — or bowing accompanied by short stature — may indicate an underlying condition such as Blount's disease (a growth plate disorder) or rickets (from vitamin D deficiency), and warrants careful evaluation. Treatment is guided by the underlying cause and severity, ranging from simple observation for physiological bowing to bracing or, in more severe or persistent cases, surgical guided-growth procedures.
Key Benefits
Clear distinction between normal physiological bowing and conditions needing treatment
Avoids unnecessary intervention for bowing that will self-correct with growth
Early identification of Blount's disease or rickets prevents progression
Guided-growth and bracing options correct deformity while preserving normal bone growth
Regular growth monitoring ensures timely intervention if bowing does not improve
Frequently Asked Questions
Is it normal for my toddler to have bow legs?
Yes — mild bow legs are a normal part of development in infants and toddlers and typically improve naturally by age 2–3 as the legs straighten with growth, without any treatment needed.
When should bow legs be evaluated by a specialist?
Evaluation is recommended if bowing is severe, worsens instead of improving after age 2, is asymmetric between the two legs, or is accompanied by short stature, as these can indicate an underlying condition rather than normal development.
What is Blount's disease?
Blount's disease is a growth disorder affecting the growth plate at the top of the shin bone, causing progressive and often asymmetric bow-leg deformity. It requires specific treatment, usually bracing in younger children or surgical correction in more established cases.
Can vitamin D deficiency cause bow legs?
Yes — rickets, caused by significant vitamin D or calcium deficiency, softens growing bones and can result in bow-leg deformity. Blood tests confirm the diagnosis, and treatment includes correcting the deficiency alongside addressing the deformity.
What treatment options exist for persistent bow legs?
Treatment depends on the cause and severity, ranging from simple observation with periodic X-rays, to bracing for moderate cases, to guided-growth surgery or osteotomy for severe or progressive deformity in older children.