Auricular deformities can currently be categorized into two main groups, those that are morphologic and those that are structural. Morphological deformities can be corrected with non-invasive auricular correctors within 42 days of birth. Morphological deformities such as flared ears, drop ears, hidden ears, and ape ears can be corrected noninvasively up to 42 weeks of age because the auricle is structurally normal, but the shape is unattractive and abnormal and needs to be corrected. Because the auricle is softer at less than 42 weeks, and because hyaluronic acid is still present as it has just come out of the mother’s body, the shape can be improved by non-invasive correction. Structural deformities are categorized into 3 degrees, I, II, and III. I degree deformity can be left untreated if it does not have any particular effect, while II and III degree deformities require surgery at a later stage, and the optimal time for surgery is during the preschool years, when a certain height and weight standard is reached. Auricular deformities may be accompanied by middle ear deformities (e.g., acoustic chain deformity), which can be treated surgically.