Action of Intra-auricular Topical Lidocaine on Tinnitus

The main objective of this clinical trial placebo controled is to evaluate the action of intraauricular topical lidocaine on tinnitus.The question to be answered is whether lidocaine is superior to placebo (distilled water) in reducing tinnitus intensity when applied topically within the external auditory canal.Tinnitus intensity will be measured using the visual analog scale and acuphenometry before and after lidocaine or placebo application.

Inclusion Criteria:Adult patients who have had continuous, uni or bilateral tinnitus, for at least 6 monthsExclusion Criteria:Otological infectionTympanic membrane perforationAnatomical alteration of the external earPulsatile tinnitusObjective tinnitusKnown allergy to lidocaine or other topical anesthetic and pregnancy