Rehmannia glutinosa is a commonly used Chinese herbal medicine in clinic, which is paired with most Chinese herbal medicines. From the medicinal value, the efficacy of Rehmannia glutinosa is also obviously different. There are many researches on Rehmannia glutinosa in modern medicine. The main components of Rehmannia glutinosa are iridoid and its glycosides, sugars and glycosides, amino acids and various trace elements, which play an important role in drug development and utilization.

Rehmannia glutinosa is a perennial herb with a height of about 10-30 cm, long gray glandular hairs and villous, fleshy rhizomes, yellow when fresh, and purplish red stems. The leaves of Rehmannia glutinosa are usually rossetter at the base of the stem, which strongly decreases upward into bracts, or gradually decreases to the stem alternately. The whole leaf blade is ovate to oblong. The top is green, the bottom can be purple or purplish red, and the edge is serrated or jagged. Dihuanghua can be arranged in a raceme at the top of the stem, or it can be scattered on the stem alone in the axils of leaves, with a slightly concave or blunt apex, yellow-purple inside, purple-red outside and villous on both sides. ?

Rehmannia glutinosa is a kind of Chinese herbal medicine, mainly the fresh roots or dry roots of Scrophulariaceae plants can be used. After special processing, Rehmannia glutinosa can be divided into fresh Rehmannia glutinosa, dried Rehmannia glutinosa and Rehmannia glutinosa. Rehmannia glutinosa is mainly processed by different processing methods, and its properties, tastes and effects are different. In fact, Rehmannia glutinosa can be divided into two kinds, namely, Radix Rehmanniae and Radix Rehmanniae, and their medicinal values are also obviously different. This is the main purpose of Radix Rehmanniae, which can nourish yin and blood, and is more suitable for patients with obvious symptoms of yin deficiency. Rehmannia glutinosa has the functions of enriching blood and yin, enriching blood and depleting marrow, and is often used for symptoms of yin deficiency and excessive fire caused by kidney essence deficiency and liver and kidney deficiency.

Rehmannia glutinosa is a cold Chinese herbal medicine, so there are many problems that need to be paid attention to in the usual use. For example, patients with spleen and stomach deficiency and people with cold spleen and stomach can't eat more, and patients who can cause diseases can take it home, and people who often have cold constitution such as diarrhea can't eat Rehmannia glutinosa, otherwise patients will get worse.