Tinnitus-the perception of sound in the absence of an actual external sound-represents a symptom of an underlying condition rather than a single disease. Several theories have been proposed to explain the mechanisms underlying tinnitus. Tinnitus generators are theoretically located in the auditory pathway, and such generators and various mechanisms occurring in the peripheral auditory system have been explained in terms of spontaneous otoacoustic emissions, edge theory, and discordant theory. Han BI, Lee HW, Kim TY, Lim JS, Shin KS. Tinnitus: characteristics, causes, mechanisms, and treatments. J Clin Neurol. 2009 Mar;5(1):11-9. doi: 10.3988/jcn.2009.5.1.11. Epub 2009 Mar 31. PMID: 19513328; PMCID: PMC2686891.
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Is tinnitus permanent?
Acute tinnitus can last from a few minutes to a few weeks after noise exposure.24 In some cases, tinnitus has a gradual onset and several years can pass before an intermittent, low-intensity tinnitus becomes bothersome.25 Spontaneous remission by natural habituation is experienced by more than three-quarters of sufferers. Habituation occurs within the CNS, whereas adaptation involves a peripheral sensory organ.8 For those in whom the condition worsens, the tinnitus intensity increases over time but its pitch tends to remain stable.22 If tinnitus persists for more than 2 years, it is considered permanent and irreversible.26. Han BI, Lee HW, Kim TY, Lim JS, Shin KS. Tinnitus: characteristics, causes, mechanisms, and treatments. J Clin Neurol. 2009 Mar;5(1):11-9. doi: 10.3988/jcn.2009.5.1.11. Epub 2009 Mar 31. PMID: 19513328; PMCID: PMC2686891.
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What causes tinnitus?
Causes include hearing loss, prolonged noise exposure, ear injury, aging, stress, and neurological changes affecting auditory processing. Eggermont JJ, Roberts LE. The neuroscience of tinnitus. Trends Neurosci. 2004 Nov;27(11):676-82. doi: 10.1016/j.tins.2004.08.010. PMID: 15474168.




