The raw ground that clears heat and cools the blood (relieves blood heat by clearing heat) is processed and steamed to become the cooked ground that nourishes yin and replenishes blood (nourishes the blood in the body). Shengdi is mainly used for heat diseases, while ripened di is mainly used to nourish blood and nourish yin.
The effects of Radix Rehmanniae Praeparata are to clear heat and cool blood, nourish yin and promote the production of body fluid. It is mainly used in warm-heat diseases in which heat enters the camp and blood (the degree of invasion of heat into the body is deep and the symptoms are more serious), body heat is very intense at night, heartburn and insomnia, internal heat due to yin deficiency, vomiting of blood, epistaxis, thirst due to injury of body fluid and constipation.
The effects of Radix Rehmanniae Praeparata are to tonify blood, nourish yin, benefit essence and fill in marrow. It is mainly used in treating blood deficiency with yellowish complexion (yellowish color without luster), irregular menstruation or amenorrhea, as well as conditions such as lumbar and knee soreness and tenderness (a feeling of soreness and weakness of waist and knees), dizziness, dizziness, blurred vision, night sweating (abnormal sweating after going to sleep, sweating stops after waking up), spermatorrhea and other conditions due to deficiency of yin in liver and kidney (deficiency of yin in liver and kidney).
The adverse effects of Radix Rehmanniae Praeparata and Radix Rehmanniae Glutinosa are not known. Raw Radix Rehmanniae Praeparata should not be used if the spleen is deficient in dampness and stagnation, or if the abdomen is full and the stools are loose (thin and unformed). Rehmannia glutinosa is viscous in nature and hinders digestion, so it should not be taken by those with stagnant qi and phlegm, bloating and pain in the epigastrium (abdomen), or those with little food and loose stools.
If medication is needed, consult a doctor first and take it under the doctor’s guidance, do not blindly self-medicate.