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Myofacial Pain is the most common form of temporomandibular disorders (TMD), affecting principally women in reproductive age. The etiology of TMD is still controversial. Currently a multifactorial theory has received a great support among the scientific community. This theory draws attention to the interaction of psychological, neuromuscular and oral pathogenic factors. Objectives: to describe the possible etiological factors of the Myofacial Pain; and to evaluate the effectiveness of the current treatments for Myofacial Pain. Materials and methods: a narrative review of the etiological factors and epidemiological data of Myofacial Pain introduces this work. Thereafter the author presents five systematic reviews of RCTs which have been published during the last thirteen years (1999-2012) for the use of acupuncture, low level laser therapy, drugs, physiotherapeutical interventions, splint therapy, and psychosocial interventions in the treatment of Myofacial Pain. Moreover, the author reports a systematic review and meta-analysis of all the available literature of two modern approaches for the treatment of Myofacial Pain. A comparison between the “usual treatment” based on splint therapy and psychosocial interventions was conducted. Results: the author did not find sufficient evidence to support therapies based on one single intervention. However, the condition of the patients with myofacial pain could be treated more effectively with combined treatments. After comparing “usual treatment” with psychosocial interventions, the author observed a tendency of the latter to improve psychological outcomes, whereas the first one was slightly more effective to enhance clinical functional outcomes. In general, a high level of heterogeneity was observed among the included studies of the different systematic reviews. The quality of the studies is susceptible to be improved. Clinical implications: the author proposes core outcomes to be implemented within the research on myofacial pain in particular and temporomandibular disorders in general, in order to enable scientifical comparisons between different therapies.