Medical use of magnesium sulfate is mainly used to treat constipation, on the hypertensive syndrome of pregnancy and eclampsia, also has a certain effect. The use of the method is hot compress, in the hot compress for the swelling also has some help, is 50% of the proportion, local appearing redness and swelling when the hot compress will be very effective. After the birth of a child, you can also apply hot compresses, which will be helpful for the swelling of the pubic area and can quickly return to a normal state, and can also help the uterus contract. The intravenous drip is 25%, which needs to be diluted with glucose, and for suppressing contractions, 10%, which also needs to be diluted with glucose. However, it needs doctor’s guidance in the process of use, and should not be used arbitrarily, otherwise other conditions are likely to occur and lead to changes in the body.