Guava leaves for guava leaves, drink water has a certain astringent diarrhea (by enhancing the astringent function of the intestinal tract to alleviate diarrhea), astringent haemostasis (with astringent drugs to treat bleeding conditions) and other effects. Guava leaves for myrtle plant guava dry leaves, with astringent antidiarrheal, astringent effect, can be used to treat or improve diarrhea, dysentery more than the disease; external use, it can be used to treat eczema itching, bruises, wounds and bleeding. Guava leaves in water also have the above effects, but due to the limited medicinal constituents analyzed, the efficacy of weak, can not have a better treatment of disease effects. In order to ensure the safe use of Chinese herbs, it is recommended to use Chinese herbs alone or in combination under the guidance of a doctor’s diagnosis, do not use on your own, and it is not recommended to blindly use Chinese herbs in water.