Sudden deafness can be caused by viral infections, or drug poisoning, etc. The specific clinical symptoms are sudden hearing loss, which may also be accompanied by tinnitus. 1. Causes: The most common cause of sudden deafness is viral infection, which may cause local tissue damage or damage to the auditory nerve, thus causing hearing loss. If you take some ototoxic drugs, such as aminoglycoside antibiotics, etc., it will lead to hearing impairment. Some patients are caused by suffering from tumor. 2. Symptoms: The main symptom of this disease is sudden hearing loss in a short period of time, which may be accompanied by tinnitus or stuffy ear, or dizziness. If hearing loss occurs, you should consult a doctor in time to find out the cause and follow the doctor’s instructions.