Microgalvanism is an important evolution in the understanding of many symptoms related to jaw and neck pain. It is the starting point for the different clinical observations that are linked to the presence of metals in the body (in the mouth specifically). Specific devices have permitted us to measure the influence of microgalvanisms on the body. A microgalvanism can be present between two metals in the mouth and/or a metal in the mouth and a bracelet or a ring. A current of 300 milivolts or more is likely to disrupt proper neuromuscular functioning. The presence of one single metallic charge can provoke relatively large currents, and the presence of charges at numerous sites (earrings, necklaces, rings, bracelets, etc.) seems to cause a distribution of currents.