Ear puncture for fluid aspiration is not painful. This is because before the ear puncture is performed, the eardrum is anaesthetized with local bupivacaine and the ear puncture is painless. Ear puncture and fluid extraction is a method of treating exudative otitis media, which allows for the extraction of viscous fluid from the middle ear tympanic cavity and can be accompanied by intra-drum dexamethasone and chymotrypsin flushing to treat exudative otitis media. After the puncture, the pressure in the middle ear tympanic cavity reaches equilibrium, the negative pressure disappears, a large amount of fluid flows into the external ear canal through the tympanic membrane puncture hole, the environment inside the tympanic cavity is improved, the inflammation slowly subsides, the tympanic cavity returns to a dry cavity, making the stuffy feeling in the ear disappear and the hearing gradually returns to normal. The tympanic membrane is usually punctured several times to extract fluid, and if it is not cured after several treatments, tympanic tube placement should be considered to treat exudative otitis media.