外耳道由骨与软骨组成,表面覆以皮肤。软骨部皮肤中有耵聍腺,分泌一种黄而稠的液体,暴露于空气中,干结后形成薄的屑片,有如雪花状,称为耳耵聍,俗称耳屎。少数人的耵聍状如粘液,称为油性耵聍,俗称油耳或汤耳。耵聍能粘附灰尘和小虫等,对外耳道起保护作用。但有些人误认为有耳屎是不卫生,常常用发卡、 External auditory canal consists of bone and cartilage, the surface covered with skin. In the cartilaginous skin, there is a gnat, which secretes a yellow and thick liquid that is exposed to the air and forms a thin chip after drying. It has a snowflake-like shape called auricles, commonly known as ear wax. A small number of people like the mucilaginous, called oily 耵 聍, commonly known as oil ears or soup ear.耵 聍 can adhere to dust and insects, etc., on the external auditory canal protection. However, some people mistakenly believe that there is no health of the ear wax, often with a hair card,