Bow legs and knock knees can be part of childhood development, but pain, asymmetry or worsening shape deserve assessment. Ordinary developmental bowing often improves without treatment. That does not mean every bent leg is normal, or that a shoe can straighten it.
By JOYO editorial · Sources checked September 18, 2026. General information, not a diagnosis. JOYO sells children’s shoes; this commercial interest does not make a shoe a treatment. Follow your child’s clinician’s advice for an identified condition.
Appearance is one part of the picture
Age, symptoms and how the pattern changes matter alongside appearance. A photograph or shoe advertisement cannot distinguish ordinary growth from a condition that needs care.
What the terms mean
| Term | Appearance | Context |
|---|---|---|
| Bow legs | A gap remains between the knees when the feet are together. | Can occur in young children; progression and symmetry matter. |
| Knock knees | A gap remains between the ankles when the knees are together. | Common during childhood, but symptomatic or unusual patterns need review. |
Bow legs
AAOS describes physiologic bowing as common under age two. It typically starts improving around 18 months and corrects by roughly ages three to four. Other causes, including Blount's disease or rickets, require a different approach. Read the AAOS explanation.
Knock knees
NHS describes knock knees as common at ages three to six and often improving as children grow. Its assessment guidance also advises a GP review when a child with knock knees is under two or over five, or has pain, swelling, asymmetry, worsening alignment or difficulty walking. An expected developmental pattern is not a reason to ignore symptoms. Read the NHS guidance.
Will it improve on its own?
That depends on the cause. A clinician may monitor an ordinary developmental pattern, but this article cannot confirm that a particular child has one. Keep any follow-up plan you are given rather than using the age ranges here as a deadline to wait for.
Do corrective shoes or braces help?
AAOS states that physiologic bowing does not need active treatment, while some diagnosed causes need specific care. Do not apply the “no treatment” message to every condition or stop prescribed care because a general article says children grow out of bowing.
When to arrange an assessment
Discuss pain, a limp, one leg looking different from the other, worsening alignment or difficulty walking with your child's clinician. AAOS describes examination and, in some situations, X-rays to distinguish causes.
Sudden inability to bear weight or sudden hip/knee/thigh pain needs emergency assessment. A limping child who is feverish and generally unwell also needs urgent help. See the NHS emergency signs for a limping child and use local emergency services as appropriate.
Keep everyday comfort separate from treatment
When discussing footwear with a clinician, bring the actual pair and any prescribed inserts. Describe where it rubs or slips and what activities are difficult. A shoe can fit poorly regardless of whether it is called conventional, orthopedic or barefoot.
Choosing everyday shoes
Follow individual footwear instructions if your child has a diagnosed condition. For ordinary shopping, compare children's models, fastening and size information. The index is not a ranking of shoes that correct bow legs or knock knees. Confirm fit and return conditions with the retailer.
Related questions
When to seek help about toddler feet and walking · How to read children's size charts
Common questions
Can barefoot shoes straighten my child's legs?
We do not recommend a barefoot shoe as a treatment for leg alignment. Assessment and any treatment depend on the cause.
Sources
AAOS bowed-legs guidance and NHS knock-knees and limping guidance are linked beside the relevant statements. How JOYO compiles and discloses its comparisons.