Raw and cooked Dihuang decoction has certain effects of clearing heat and cooling blood (relieving blood heat by clearing heat), nourishing yin and tonifying blood (nourishing blood in the body), and nourishing yin and generating fluids, and can be used to assist in the treatment of blood-heat hemorrhage and bleeding, metrorrhagia (excessive menstrual flow or spotting of menstruation), and hyperemia. With the effects of nourishing yin and generating body fluid, clearing heat and cooling blood, Dihuang can be used to treat blood-heat hemorrhage, warm-heat spots (spots and plaques on the skin caused by warm-heat toxins invading the human body), strong heat and irritable thirst (high fever accompanied by irritable thirst), yin deficiency and fever, and tidal fever (a burst of heat, feeling that the heat is penetrating from inside the bones to the outside), and so on. The adverse effects of Radix Rehmanniae Praeparata are not clear, and it is not recommended for those with abdominal fullness and loose stools (thin and unformed feces), or those with spleen deficiency and dampness stagnation. Radix Rehmanniae Praeparata has the efficacy of benefiting the essence and filling the marrow, nourishing Yin and replenishing Blood (nourishing the blood in the body). It can be used to treat palpitations (rapid heartbeat, often accompanied by panic attacks) and insomnia, blood deficiency and yellowish coloration, menstrual disorders, and dislocation of Blood (excessive menstruation or dripping of menstruation). The adverse effects of Radix Rehmanniae Praeparata are not clear, the product is sticky and indigestible, and is contraindicated in people with dampness (too much dampness leading to fullness and discomfort in the spleen and stomach), phlegm and stagnation of qi, and those with little food and loose stools. The two decoctions have a certain degree of the above effects, and have an auxiliary therapeutic effect on the above diseases, in order to fully play its therapeutic role as a traditional Chinese medicine, generally need to be paired with other traditional Chinese medicines into the decoction application. If you feel unwell, it is recommended that you go to the hospital in time to see a doctor. Taking traditional Chinese medicines such as Radix Rehmanniae Praeparata and Radix Rehmanniae Glutinosa needs to be guided by a professional doctor, and should not be used on your own.