Sudden tinnitus can be caused by otitis media, Eustachian tube obstruction or auditory neuropathy. 1. Patients with otitis media may experience ear pain, pus, hearing loss, and occasionally acute tinnitus. Otitis media is usually caused by bacterial or viral infections, and common causative organisms include Staphylococcus aureus, Streptococcus pneumoniae, and so on. 2. Blockage of the eustachian tube can also lead to sudden tinnitus, such as chronic sinusitis, adenoid hypertrophy and other factors can cause the disease. 3. Patients with cochlear or auditory neuropathy will experience persistent tinnitus, accompanied by dizziness, hearing loss and other symptoms. Unexplained loss of hearing or tinnitus requires prompt medical attention, and it is recommended that the patient go to the ENT department to find out the cause of the disease.