Orthodontic problems, soft tissue trauma, focal dystonia, denture retention, herpes labialis, dry mouth and temporomandibular joint (TMJ) disorders were identified as orofacial problems of career musicians.It has been well documented in Chinese acupuncture medicine that "Hegu (LI 4) is indicated for orofacial problems".

Chinese Shandong University of Chinese Medicine research indicated:

The afferent nerve fibers from the LI 4 region and the orofacial part ascend to the spinal cord, nucleus of solitary tract, reticular formation, thalamus and the cerebral cortex, respectively, and overlap in the thalamus, cerebral cortex, etc. Under the circumstances, the interaction and functional integration of the afferent signals from LI 4 acupoint and the orofacial region may occur in the central nervous system. In addition, many relevant neuroactive substances (for example, serotonin, substance P, enkephalin, y-aminobutyric acid, glycine, calcitonin gene-related peptide, etc.) released from the sensory and motor neurons in the corresponding cerebral regions may constitute part of the substantial basis of that "Hegu (LI 4) is indicated for many orofacial disorders".

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Reference:Yu XH, Wu FD.Zhen Ci Yan Jiu. 2011 Oct;36(5):388-91.