What is the difference between raw Rehmannia and cooked Rehmannia

Both raw rehmannia and cooked rehmannia have medicinal value. Raw rehmannia can nourish yin, clear heat and cool blood, while cooked rehmannia can both nourish blood and yin, as well as replenish essence and marrow. We must use them correctly according to their effects.

1. Raw land

Raw Rehmannia root is bitter and cold in nature and clears away heat, while it is sweet and cold in nature and nourishes yin. It is a cool and nourishing product, good at nourishing yin, clearing heat and cooling blood. It has the effects of clearing heat and cooling blood, nourishing yin and promoting body fluid, and moistening the intestines. It is mainly used for plague heat entering the blood; blood heat causing hematemesis, epistaxis, hematuria, metrorrhagia and other bleeding symptoms; it can also treat yin deficiency syndrome in the late stage of fever, yin deficiency fever, internal heat and thirst; it can cause the effect of increasing water to move the boat for yin deficiency, intestinal irritability and constipation. Because this medicine is cold, slippery, greasy and stagnant, it is not suitable for people with spleen deficiency, poor appetite, loose stools, or warm stagnation and fullness in the middle.

Raw Rehmannia root is bitter and cold, clears away heat, and is sweet and cold, moisturizing and nourishing Yin. It is a refreshing and nourishing product.

2. Rehmannia glutinosa

Rehmannia glutinosa tastes sweet, slightly warm and moist in nature. It enters the liver and kidney meridians. It is good at replenishing blood and yin, and can also replenish essence and marrow. It is mainly used to treat all symptoms of blood deficiency, yin deficiency and lack of essence. Its main functions are to nourish blood and yin, replenish essence and benefit marrow. It is used for symptoms such as chlorosis, dizziness, palpitations, irregular menstruation, metrorrhagia, hot flashes, night sweats, spermatorrhea, and thirst caused by blood deficiency. It can also treat low back pain, weak legs, dizziness, deafness, tinnitus, and premature graying of hair caused by deficiency of essence and blood. Because this medicine is greasy and can easily hinder digestion, it is easy to be used together with stomachic medicines, Amomum villosum, and dried tangerine peel. It is not recommended for patients with spleen and stomach qi stagnation, phlegm-dampness obstructing the abdomen, and suffering from abdominal distension, poor appetite and loose stools.

3. The efficacy and function of Rehmannia glutinosa

"Shennong's Herbal Classic": sweet and cold. It is mainly used to treat fractures, broken tendons, injuries, expel blood stasis, fill the bone marrow, and grow muscles. Making soup can eliminate accumulation of cold and heat and relieve numbness. The living are especially good.

"Famous Doctors' Records": Great Cold. It is mainly used to treat women's metrorrhagia, postpartum blood, thin heart, suffocation, physical injury, fetal movement, bleeding, fetal retention, miscarriage, fracture, blood stasis, blood retention, nosebleed, and vomiting blood. It can be crushed and drunk.

"Material Treatise": Jun. It can replenish deficiency, warm the middle and lower Qi, and unclog blood vessels. Treats abdominal pain after childbirth and vomiting blood. It is also said that raw Rehmannia root is sweet, neutral and non-toxic. It can relieve various kinds of heat, promote blood circulation, and relieve menstrual obstruction. It is not good for the urinary system, but can soften the heart and abdomen and eliminate blood stasis. If the patient is weak and has a lot of fever, use it.