Bowlegs is a condition in which the knees stay wide apart when a person stands with the feet and ankles together. It is considered normal in children under 18 months.
Infants are born bowlegged because of their folded position in the mother's womb. Bowed legs begin to straighten once the child starts to walk and the legs begin to bear weight (about 12 to 18 months old).
By around age 3, the child can most often stand with the ankles apart and the knees just touching. If the bowed legs are still present, the child is called bowlegged.
Bowlegs may be caused by illnesses, such as:
Symptoms may include:
A health care provider can often diagnose bowlegs by looking at the child. The distance between the knees is measured while the child is lying on the back.
Blood tests may be needed to rule out rickets.
X-rays may be needed if:
No treatment is recommended for bowlegs unless the condition is extreme. The child should be seen by the provider at least every 6 months.
Special shoes, braces, or casts can be tried if the condition is severe or the child also has another disease. It is unclear how well these work.
At times, surgery is done to correct the deformity in an adolescent with severe bowlegs.
In many cases the outcome is good, and there is most often no problem walking.
Bowlegs that does not go away and is not treated may lead to arthritis in the knees or hips over time.
Call your provider if your child shows ongoing or worsening bowed legs after age 3.
There is no known way to prevent bowlegs, other than to avoid rickets. Make sure your child is exposed to sunlight and gets the proper amount of vitamin D in their diet.
Reviewed By: Neil K. Kaneshiro, MD, MHA, Clinical Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.