@attheedgeofscience recently mentioned that a doctor in Germany has completed a study with promising results where 300 patients with tinnitus have been treated with lidocaine injections to the otic ganglion. https://www.tinnitustalk.com/thread...ll-treatment-comments.1891/page-8#post-171794 https://www.tinnitustalk.com/thread...ll-treatment-comments.1891/page-8#post-171829 Unfortunately there is no further publicly information available about this study. But if you do some research yourself you can find out that there is also a German source (publication by Eberhard Biesinger, a German ENT) where otic ganglion injections as a tinnitus treatment are discussed superficially. The otic ganglion is a particular joint of the trigeminal nerve (nervus trigeminus). Clinical research in the US has shown that the trigeminal nerve plays a significant role in the development of tinnitus. Injections to the otic ganglion with 3 ml fluid which consists of 1% procaine/lidocaine are already a proven method to treat the following conditions: - temporal-mandibular joint disorders - disorders of the masticatory muscles - diseases of the parotid gland (parotitis) - neuralgia of the third division of the trigeminal nerve Furthermore are such injections used in general to anesthetize the mandibular joint for various treatments. Sources (German): Tinnitus - Endlich Ruhe im Ohr (Page 140) Taschenatlas der Neuraltherapie nach Huneke (Page 68) Lehrbuch und Atlas Neuraltherapie (Page 158) Never heard of lidocaine injections to the otic ganglion as a possibility of treating tinnitus. Will talk with my ENT about these injections and I think I will give it a try if he is willing to do it.