The correct hot compress method for magnesium sulfate hot compress is to mix the concentration and heat it, use sterile gauze to cover the affected area, and can be wrapped with plastic wrap. When using, pay attention to the concentration, temperature and contraindicated people and so on. Magnesium sulfate external hot compresses can be used to reduce inflammation and swelling, and can be applied to the affected area when there is inflammation or pain in the organism. It is recommended that patients pay attention to the concentration of magnesium sulfate before applying hot compresses, and it is recommended that the concentration should be blended to 25% to 50%, and then the magnesium sulfate should be heated, and the temperature should be controlled at about 40 ℃, to avoid the temperature being too high. Patients can use sterile gauze or clean towel into the magnesium sulfate solution after heating the magnesium sulfate to soak wet and cover the affected area. Patients can wrap a layer of plastic wrap outside the sterile gauze or towel, which is conducive to promoting blood circulation. It should be noted that, although there is no clear adverse reaction to magnesium sulfate hot compress, but when the temperature of the hot compress is too high, more than the temperature that the human body can withstand, the patient will experience skin redness, swelling and pain and other burns. In addition, the person who is allergic to magnesium sulfate is forbidden to use magnesium sulfate hot compresses to prevent allergic symptoms such as itching skin and generalized rash. Before using magnesium sulfate hot compresses, patients should consult a doctor, under the guidance of the doctor to carry out the correct hot compresses, to avoid improper operation resulting in discomfort symptoms.