Sheng dihuang is cold and sweet, has the effect of clearing heat and cooling the blood, nourishing yin and promoting the production of fluids, it is used to treat a variety of thermal diseases, such as blood heat bleeding, fever, Yin deficiency fever and constipation, etc., and, the treatment of yin deficiency and fire caused by dry mouth, dizziness, and dizziness. Because it is good at nourishing yin and moisturizing the effect of dryness, mostly used for laxative. Raw dihuang also enhance the role of immune function, as well as anti-tumor protection of the liver and other medicinal value.