The solution commonly used to soften earwax (i.e., cerumen) is a 5% sodium bicarbonate solution, and in some cases this is combined with saline rinsing to remove the cerumen. Cerumen is a secretion from the ceruminous glands of the cartilaginous skin of the external auditory canal, and varies in texture from hard and fluffy like mud to hard like stone. If the cerumen is dry and hard and difficult to remove, it needs to be softened and removed. Generally, 5% sodium bicarbonate solution is often used to soften the cerumen by dropping it in 4-6 times a day. Saline rinsing of the external auditory canal is often used to remove them after softening. Excessive secretion of cerumen or obstruction of its expulsion may cause otitis externa if it irritates the external auditory canal for a long time. If there is any discomfort, it is recommended to consult a doctor in time. Specific operations should be carried out under the guidance of specialized physicians.