http://articles.mercola.com/sites/articles/archive/2002/02/23/tmj.aspxBy Lina Garcia, DMD, DDS TMJ pain, and or migraine headaches tend to have some or all of the following signs, and symptoms. Observable signs include: 1 - Locking or clicking of one or both lower jaw joints (TMJ), with or without pain. 2 - Limited jawenCommunityServer 2008.5 SP1 (Build: 31106.3070)