PiNi is a common Chinese medicine, Chinese medicine is also known as manganese nitrate, is a sulfate mineral salt after fine processing and become, there is a wide distribution in various places, PiNi’s application range is also very wide. PiNi tastes salty and bitter, cold and cool, belonging to the stomach and large intestine meridian, the main effect is to clear the fire to eliminate swelling, diarrhea, laxative heat, moistening dryness and softening, in the clinic can be taken internally or externally, PiNi is not easy to be absorbed by the intestinal tract after internal use, so that the water in the intestines, while the intestinal tract has a chemical stimulation, so as to achieve the effect of diarrhea and laxative. It is mainly used for dry stool, intestinal solid heat, intestinal carbuncle swelling and pain, etc. It can also be used externally for sores, abscesses, breast swelling and pain, etc. It can promote lymphatic reflux, enhance metabolism, reduce swelling and relieve pain. It is forbidden for those with cold spleen and stomach deficiency and pregnant women, and has an auxiliary therapeutic effect on the period of reflux or weaning.