1. For external use, such as obvious eczema, traumatic edema and inflammation, external application of magnesium sulfate can play the role of convergence, anti-inflammatory and detumescence.

2. For internal use, magnesium sulfate can improve potassium ion metabolism. For intractable hypokalemia, intravenous or oral magnesium sulfate can improve potassium ion metabolism, which plays a great role in the increase of potassium ion and the improvement of function.

In addition, magnesium sulfate can expand smooth muscle and has a certain antihypertensive effect, especially for purpura caused by pregnancy induced hypertension. Magnesium sulfate is a traditional drug. For severe seizures, under the condition of poor control, close observation of breathing or the use of ventilator, use a small amount of magnesium sulfate to stop pumping and anti epilepsy. However, magnesium sulfate has great side effects. At present, it is rarely used for intravenous treatment except oral and external application.