Whether the length of short legs of three-month-old babies is normal or not needs to be judged according to the specific conditions of patients. Normal: Usually the difference between the length of the legs of three-month-old babies is within one centimeter, which is considered normal and does not require special treatment. Most babies can recover gradually with growth and development. But for three-month-old babies with a difference of more than one centimeter, it is an abnormal situation, and parents need to pay attention to it in time. Abnormal: three months baby long short legs may be hip dysplasia, lower limb dysplasia and other conditions caused by the patients need to consult a doctor in a timely manner, and after a clear cause, targeted treatment. And parents usually need to help the baby to do a good job of daily care, so as not to aggravate the symptoms. It is recommended that three-month-old babies with short legs, parents pay close attention to the baby’s situation, if it is anomalous phenomenon, but also need to seek medical treatment as soon as possible.