There are cerumen glands in the outer 1/3 of the external ear canal that can secrete to form cerumen. A small amount of cerumen usually does not require special treatment and can be discharged on its own with biting, swallowing, and pulling on the external ear canal. However, if there is more cerumen and it forms a cerumen mass, you can go to the hospital or have it cleaned at home. If a cerumen embolism forms, you usually need to go to the hospital to clean it under an endoscope or soak it locally with cerumen water, and then go to the hospital after three days to have the external ear canal flushed to clean it out. However, if the outer ear canal is blocked, the ear will become stuffy and swollen, and hearing loss will occur.