The functions and efficacy of hot compresses with fried salt include activating blood circulation and relieving pain (relieving pain by removing blood stasis), and dispelling wind and dispersing cold (removing wind and dispersing cold). However, as a form of physical therapy, the efficacy of fried salt hot compresses is limited, and medication is needed to treat the disease, fried salt is only an aid. If there is any discomfort, please seek medical advice immediately. Frying coarse salt, wrapping it in gauze and placing it on the painful area can effectively relieve pain because the heat can penetrate into the body and promote blood circulation, which can activate blood circulation and eliminate blood stasis (promote blood circulation and eliminate blood stasis in the body) to relieve pain. If you accidentally sprain can first cold compress, 24 hours later take the salt bag hot compress, can dissipate blood stasis. Cold condenses the meridians, and pain occurs when the meridians do not circulate. Neck, shoulder, waist and leg pain caused by cold soreness, can be fried salt hot compresses to remove wind and cold, through the pain (dredge the meridians, relieve pain), can relieve local symptoms. Because of the high temperature of fried salt, the local coupling (pores) open, heat penetration into the subcutaneous, can drive cold out.