Hi there.. I can understand your worry.. genu valgum, commonly called knock knee, is a condition in which the knees angle in and leg seems to be bent outwards..mild genu valgum is seen in children from ages 2 to 5, and is often corrected naturally as they grow..but if it s due to rickets(
vitamin d deficiency in children)then deformity continues as he grows to become more worse..start your child on vitamin d supplements along with
calcium.. it's going to be fine as he grows.. if not then consult orthopedician for further treatment..