Generally speaking, if the baby is placed in the supine position with the ankles close together, and if the distance between the knees is found to be >3cm, it can be basically identified as looping legs.
In addition to the above simple identification methods, you can also go to the hospital for X-ray filming of both lower limbs to give professional assessment. Generally speaking, if the baby is older than 2 years old and the degree of knee inversion is >25 degrees, it can be judged as O-shaped leg.
Most of the babies with O-shaped legs are caused by rickets, and low muscle strength of both lower limbs can’t be ruled out. If the hospital examination, the baby suffers from rickets, can be supplemented with vitamin D and calcium treatment; if the diagnosis is muscle strength, muscle tone, then we must begin to exercise the muscle strength of the lower limbs, if necessary, also need to wear a brace treatment.
In summary, this is the identification of rotundity, it is recommended to go to the hospital to do professional testing, so as not to delay the condition.