The correct method of applying Mannite externally to reduce swelling is according to the size of the affected area, select the appropriate amount of Mannite powder mixed with water, to be able to apply all over the affected area as appropriate, and then wrapped with gauze. Mangnit has the effect of diarrhea heat and laxative (removing heat, dredging the bowels), moistening dryness and softening the hardness, clearing the fire and reducing the swelling. Mangnit, salty, bitter, cold in nature. Attributed to the stomach and large intestine meridian. Used for solid heat constipation, stool dryness, stagnation, abdominal pain, intestinal carbuncle (carbuncle in the intestines, with fever, right abdominal pain, can feel the lump as the performance) swelling and pain. External treatment can treat breast carbuncle, hemorrhoids, swelling and pain. It should be noted that pregnant women should be cautious; it should not be used together with sulfur yellow and trigonelline. If the symptoms need to external application of manganese nitrate patients, need to go to a regular hospital after consultation in a professional doctor under the guidance of the use of the condition, not blindly used on their own.