Ground elm drinking water has a certain cool blood to stop bleeding (so that the blood cool and moist, to prevent bleeding), detoxification and astringent effect, used for the treatment of water and fire burns, blood in the stool, leakage (excessive menstrual flow or dripping), bloody diarrhea, hemorrhoidal blood, carbuncle sores and sores, and so on. The ground elm belongs to the bleeding medicine in the cool blood to stop bleeding medicine, family for the Rosaceae plant ground elm or long-leaved ground elm dry root. Ground elm flavor bitter, sour, astringent, cold. It enters the liver meridian and the large intestine meridian. Ground elm can be used internally and externally. The adverse reactions of Diels-Alder are not clear. The bitter and cold nature of the ground elm, the spleen and stomach cold (spleen and stomach weakness and cold) people should not use ground elm drink water. Allergic to ground elm is prohibited to drink water with ground elm. However, Chinese medicine mainly works through the decoction, so the efficacy may be affected due to the limited release of active ingredients, if necessary, please use under the guidance of a professional Chinese medicine practitioner.