Hearing loss in one ear, most often caused by cerumen (i.e. earwax) embolism, secretory or purulent otitis media, and nerve deafness, usually does not heal on its own and requires examination in an ENT department and treatment for the specific cause. Hearing loss in one ear should not just wait for self-healing, but should be further examined for the cause and then treated aggressively. If it is caused by cerumen embolism, hearing can be gradually restored after the cerumen is completely removed. However, it is necessary for the doctor to perform regular operations, and you should not blindly pull out your own ears. For hearing loss caused by otitis media, anti-inflammatory treatment is required; for hearing loss caused by neurogenic deafness, drugs that nourish the nerves and improve microcirculation are required. Since there are many causes of hearing loss, it is usually necessary to go to the ENT department for examinations such as temporal bone CT and active treatment to avoid further hearing loss.