Patients who have left and right ears that are not the same size are most likely due to a congenital developmental problem, a common malformation. The cause of this condition may be a genetic mutation caused by toxic drugs taken by the pregnant woman during pregnancy or excessive exposure to radioactivity. If the symptoms are not very obvious, patients do not need to worry too much and can not receive treatment. If the size difference is very big you can go to the local hospital ENT clinic in time to ask for doctor’s help. Generally speaking, this condition needs to be corrected through surgery. In addition, the patient should pay attention to the postoperative care in time to change the medicine.