Tinnitus is a self-induced ringing in the ear and is often a precursor to deafness. Tinnitus is a subjective sensation of sound in the patient’s ear or head, caused by a disorder of the auditory function. If it is caused by an ear lesion, it often coexists with deafness or vertigo. If it is caused by other factors, it may not be accompanied by deafness or vertigo. Tinnitus is an abnormal sound sensation that occurs in the absence of any external stimuli. For example, a monotonous or mixed sound such as cicadas, buzzing or hissing in the ear, but in fact there is no corresponding sound in the surrounding environment, which means that tinnitus is only a subjective sensation. Tinnitus can be transient or persistent. Severe tinnitus can be very disturbing and stressful. If the tinnitus is transient and comes and goes, it is generally a physiological phenomenon, so you do not need to be overly nervous and can just let it go. If the tinnitus is persistent, especially if it is accompanied by other symptoms such as deafness, vertigo and headache, you should be alert and seek medical attention as soon as possible.