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Compresses or packs designed to apply either cold or heat. These devices typically consist of compact plastic or fabric bags made of several layers of cotton, gauze, or linen (i.e., compresses), or compact plastic or fabric bags (i.e., packs); they may contain temperature-retaining substances such as pliable silica gels; the devices are usually capable of conforming to the contour of the body. Cold/hot compresses and packs may be cooled by immersion in cold water, a refrigerator, or a freezer and warmed using a microwave oven. Cold/hot compresses are intended to apply a thermal therapy to a specific body surface; they are mainly used in the treatment of pain, muscle spasms, strains and sprains and joint stiffness.
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