So-called ear cysts are usually seen clinically in the following two conditions: i. Pseudocysts of the auricle, also known as non-purulent auricular chondromyelitis or auricular plasmacytic cysts. The exact etiology is not entirely clear, but may be related to local irritation of the auricular cartilage, such as repeated pinching, pressure during sleep, etc. It is a non-infectious plasma exudate formed in the auricular cartilage, usually located in the auricular cavity, the tragus fossa or the ear boat, and varies in size. Second, auricular sebaceous cysts, mostly due to blockage of the sebaceous ducts in the skin in front and behind the auricle, are formed by gradual secretion inside the glands, usually small, about several millimeters in diameter, and mostly located in the auricular cavity, behind the ear or at the entrance to the ear canal.