Earwax, also known as earwax to the general public. Cerumen is a yellowish, sticky liquid secreted by the skin cerumen glands in the cartilage of the external ear canal. Under normal circumstances, cerumen is discharged automatically with eating, chewing, talking, and laughing. However, there are times when the cerumen in the external ear canal is clogged because it has gathered too much and formed a mass-like object, which is called cerumen embolism. Cerumen is a normal physiological manifestation, and if all of it is cleaned up, it will instead damage its function of sterilizing and protecting the ear. If the cerumen forms a hard mass, it needs to be removed with a cerumen hook. If it is particularly hard, it can be softened with a 5% sodium bicarbonate injection and then sucked out with a suction device.