Hello, what is the external auditory canal? The surface of the external auditory canal is covered with a thin layer of skin, which contains rich sensory nerve endings, hair follicles, sebaceous glands and cerumen glands. The yellow-brown sticky substance secreted by cerumen gland is called cerumen, which may block the external auditory canal and affect hearing after drying. There is little subcutaneous tissue in the external auditory canal, and the skin is closely connected with the perichondrium and periosteum, so it is not easy to move.