Sodium bicarbonate ear drops are a softening agent that softens the cerumen in the ear canal, making it soft and thin, 3-5 drops/time, 3-4 times/day. Go to the hospital about 3 days after the drops to be flushed by a doctor who uses saline for ear canal flushing treatment, using the pressure of the water flow to flush out the softened cerumen. One flush is enough for some patients, and some patients may need two or more flushes to completely flush out the cerumen. There are basically no side effects to the flushing, which is relatively well tolerated by patients and does not cause significant irritation to the ear. If the patient experiences pain during the process of cleaning the ear with sodium bicarbonate ear drops, it is recommended to go to the hospital immediately in this case. It is possible that there is a local infection of the ear canal cerumen that induces pain, and in this case the cerumen should be aspirated with an aspirator.