What causes sudden ringing in one ear?

There are many reasons for tinnitus, which need to be considered from many aspects. It may be caused by diseases of the ear itself. Clinically common ones include otitis media, otosclerosis, cerumen embolism, etc., and the possibility of hypertension, hyperlipidemia, arteriosclerosis and other diseases cannot be ruled out, including long-term exposure to noise environment, which can also cause tinnitus.