One and a half year old babies with flat feet are generally recommended for the time being without special treatment, you can continue to observe, if there is still no improvement after the age of 7 years, then need active treatment.
One and a half year old baby due to the ankle bone is not fully developed, so not necessarily is flat foot, need continuous observation, if the baby after the age of 7 years old arch collapse, forefoot adduction, hind foot navicular bone protrusion phenomenon, then need to timely to the hospital for relevant examination, determine is flat foot, need to cooperate with the doctor for treatment in a timely manner.
In addition, if parents can not observe from the appearance, then need to observe whether willing to walk, in the case of walking with pain, the baby is generally not willing to walk, it is recommended to consult a doctor in a timely manner.