Hi I think my child is bow-legged. Is there any ways to certify that or what do I need to do about it?

If your child shows any of the following symptoms after age 3,please see your pediatrician 1)Bowed legs that worsen after age 3. 2)Reduced range of motion in hips. 3)knees do not touch when child is standing with feet and ankles touching. 4)Similar bowing in both legs.