Can the use of physical modalities for pain control be rationalized by the research evidence?

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Abstract
Physical modalities, including cold and heat, are widely used in the conservative management of pain associated with musculoskeletal disorders. This review has critically appraised the literature supporting the use of these modalities in the treatment of musculoskeletal pain. It was concluded that, apart from a few exceptions and in a few types of disorders, existing evidence does not support the use of these modalities in long-term pain control. There was, however, evidence that several modalities, specifically cold and a form of deep heat (shortwave diathermy), do have short-lived analgesic effects and so may contribute to more painfree function in the short term. Further research is clearly warranted to define the short- and long-term therapeutic efficacy of physical modalities in the treatment of musculoskeletal pain to justify their continued use in clinical practice.Key words: pain control, cold, heat, ultrasound, low-power laser.

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