Accessory ear, also called auricle, is caused by abnormal development of the first branchial arch. Usually there are redundant tissues of different sizes and shapes on the connection line between the tragus and the corners of the mouth. There are often some cartilage tissues in the tissues, and the skin surface of the accessory ear is sometimes colored. Accessory ear is completely redundant tissue and has nothing to do with hearing and other functions. Although sometimes the accessory auricular cartilage can be connected with the auricular cartilage, and sometimes it extends into the cheek tissue, it is useless tissue.