Shengdi, or raw dihuang, generally refers to the dried tuberous root of Dihuang (地黄), a plant of the Xuanzhenshen family, which is known for its ability to clear heat and cool the blood (by clearing away heat to alleviate blood heat), and to nourish yin and promote the production of body fluid. Raw dihuang is sweet, bitter and cold in nature; it is attributed to the heart, liver and kidney meridians. The fresh product is weak in nourishing yin and strong in clearing heat. This product is bitter and cold into the camp blood (in the four periods of warm disease Wei Qi Ying blood, belongs to the most in-depth stage or disease), for the clearing of heat, cool the blood, stopping the blood of the important medicine, but also because of its nature of the sweet and cold texture of the moist, can be clearing the heat and promote the production of fluids to quench thirst. Therefore, it can be used in treating heat entering the camp and blood (the degree of invasion of heat evil into the body is deep and the symptoms are more serious), tongue-redness and thirst, and macular rash and epistaxis (spitting out blood and nosebleed). This product is sweet and cold to nourish yin, bitter and cold to relieve heat. It enters the kidney meridian to nourish yin and reduce fire (nourishing yin essence and lowering fire), nourishes yin and fluid and relieves ambient heat, and can therefore be used in the treatment of yin deficiency and internal heat, bone vapor and laborious heat. Sheng Di Huang is afraid of Chuan Wu and Cao Wu. In addition, taking Sheng Di Huang should not be taken with a warm diet; avoid blood, radish, onion and garlic. If you need to take Radix et Rhizoma Dioscoreae, it is recommended to do so under the guidance of a doctor.