It is usually a redundant tissue of various sizes and shapes that appears in the line between the front of the ear screen and the corner of the mouth. Although the cartilage can sometimes be attached to the ear cartilage and sometimes extend into the tissue of the cheek, it is a waste tissue that serves no purpose. 1. Tympanic membrane The loose part or the whole tympanic membrane is invaginated, which is characterized by shortening, deformation or disappearance of the light cone, posterior and superior displacement of the hammer bone stalk, significant protrusion of the short protrusion of the hammer bone, and a smaller angle between the anterior and posterior folds. The tympanic membrane loses its normal luster and becomes mono-yellow, orange-red or amber in the case of tympanic effusion, and the light cone is deformed or displaced. In chronic cases, the tympanic membrane may appear grayish or milky white, with dilated microvessels in the tense part of the tympanic membrane, the short protrusions appearing chalkier than chalk, and the whammy bone stalk appearing in relief. If the fluid is plasma and does not fill the tympanic chamber, a fluid plane can be seen through the tympanic membrane. This fluid plane is like an arc-shaped hair, called the hairline, with the concave surface upward. When the head position changes, the relationship with the ground parallel remains unchanged. Bubbles can sometimes be seen through the tympanic membrane and can increase after the eustachian tube is blown open. On tympanic otoscopy, the movement of the tympanic membrane is limited. 2.Pulling cork sound After pressing the ear screen separately and releasing it quickly, the patient feels a sound in the affected ear similar to the sound when pulling a cork. 3. Hearing test The results of tuning fork test and pure music listening valve test show conductive deafness. Hearing loss varies from positive to negative, and can reach about 40dBHL in severe cases. In those with significant hearing impairment, auditory brainstem response and otoacoustic emission tests should be performed to determine if there is an effect on the inner ear. 4. CT scan The air spaces of the middle ear system may be seen to have varying degrees of increased density.