Sea salt packs are mainly used for hot compresses, equivalent to the hot ironing method in traditional Chinese medicine physiotherapy, which has the effect of warming the skin, promoting qi and blood circulation. Sea salt is seawater after boiling and sunshine after the formation of crystals, its heating is not easy to cool, mainly used to do hot compress therapy, through the local hot compresses to make the muscle relaxation, promote local blood circulation, can play a warm skin, qi activation of blood (to promote the gas operation so that the blood flow) effect. Sea salt packs belong to a health care method, can be heated and applied to the parts where pain occurs, for example, when there is pain in the neck, shoulder, waist, knee joints and other locations, the use of sea salt packs hot compresses can promote blood circulation, relieve local pain. However, it should be noted that the patient should not rely on sea salt packs to relieve pain, when the body is not well, or should go to the hospital in a timely manner for consultation and treatment, hot packs can only temporarily relieve the pain, and can not treat the disease from the root.