Sudden deafness is the sudden onset of sensorineural hearing loss of unknown origin. Since the cause of sudden deafness is not clear, there are no targeted preventive measures. As a general prevention, the following points can be noted in daily life: 1. Control systemic chronic diseases such as hypertension, hyperlipidemia and diabetes. 2. Do not overexert yourself, pay attention to the combination of work and rest, and keep your body and mind happy. 3, strengthen exercise, enhance physical fitness, avoid colds and prevent viral infections. 4, maintain a balanced diet, eat more fresh fruits and vegetables. Reduce the stimulation brought by smoking, alcohol, coffee, etc. 5.For patients who have already suffered from sudden deafness and still do not have a practical hearing level in the affected ear after treatment, in addition to the above recommendations, it is also recommended that the healthy side of the ear should be especially protected: 1. avoid exposure to noise; 2. avoid ototoxic drugs; 3. avoid ear trauma and ear infections.