[Nature and flavor] Bitter and sour, slightly cold.
 [return through meridians]Returns to the liver and spleen meridians.
 [Effects] Nourishes blood and regulates menstruation, astringes yin and stops sweating, softens the liver and relieves pain, and suppresses liver yang.
 [Indications] It is used for blood deficiency, chlorosis, irregular menstruation, spontaneous sweating, night sweats, flank pain, abdominal pain, cramps in the limbs, headache and dizziness.
 【Usage and Dosage】6～15g.
 [Contraindications] It should not be used together with Veratrum.
 【Medical records】
 "Ben Jing": "It can cure abdominal pain caused by evil qi, remove blood stasis, break up hard masses, treat cold and heat hernia, relieve pain, promote urination, and replenish qi."
 "Bie Lu": "It can smooth the blood vessels, relieve the middle, disperse bad blood, expel evil blood, remove water vapor, benefit the bladder, large and small intestines, eliminate carbuncle and swelling, (treat) seasonal cold and heat, stomach pain and waist pain caused by middle evil."
 "Materia Medica": "It can treat lung evil qi, abdominal pain, blood and qi accumulation, clear the internal organs and qi accumulation, treat evil pain and blood stasis, cure seasonal diseases and bone heat, strengthen the five internal organs, replenish kidney qi, treat heart and abdomen hardness and swelling, women's blood stasis, eliminate blood stasis, and can erode pus."
 "Tang Materia Medica": "Benefits women's blood."
 "Rihuazi Materia Medica": "It can cure wind and nourish tuberculosis, cure all diseases of women, and various diseases before and after childbirth, regulate menstruation, reduce fever and relieve restlessness, invigorate qi, cure epidemic heat diseases, plague, malaria, convulsions, women's blood circulation, intestinal wind and bloody diarrhea, hemorrhoids, fistulas, back sores, scabies, headaches, improve eyesight, red eyes, and pterygium."
 "Medical Origin": "It calms the spleen meridian, treats abdominal pain, absorbs stomach qi, stops diarrhea, harmonizes blood, strengthens the pores, purges the liver, and nourishes the spleen and stomach."
 Wang Haogu: "It regulates the middle qi, treats spleen deficiency, fullness in the middle, fullness under the heart, pain under the hypochondrium, belching, acute lung distension, wheezing and coughing, runny nose and nosebleeds in the Taiyang meridian, dry eyes, liver blood deficiency, cold and heat in Yangwei disease, abdominal pain and fullness in Daimai disease, and a dissolving waist as if sitting in water."
 "Southern Yunnan Materia Medica": "It can relieve spleen heat, stop abdominal pain, stop watery diarrhea, relieve liver qi pain, regulate the heart, liver, spleen and menstrual blood, relax the meridians and lower the qi, and stop liver qi pain."
 【Predecessors release medicine】
 Cheng Wuji: "The sourness of peony is astringent, it collects body fluids and benefits the body." "Acidity means astringency and drainage; the sourness of peony collects yin qi and drains evil qi."
 Li Dongyuan: "Some people say that the ancients regarded sour and astringent as astringent, so why does Ben Jing say that it can promote urination? It is said that peony can nourish yin, nourish moisture and retain body fluid, so urination can be done naturally, not because of the laxative effect. It is said that it can also relax the middle part? It is said that those who damage the liver can relax the middle part, that is, regulate blood, so peony is used in Siwu Decoction. Generally speaking, sour and astringent are agents that can astringe and retain moisture, so they are mainly used for the astringent body of the Taiyin meridians of the hands and feet, and can also treat the sea of blood and enter under the nine earths, and then reach the Jueyin meridian. The white color is in the west, so it is tonic; the red color is in the south, so it is purgative."
 Yu Chuan: "White peony root not only treats blood deficiency, but also promotes qi. In ancient prescriptions for treating abdominal pain, four cents of white peony root and two cents of licorice were used, named Peony and Licorice Decoction. Abdominal pain is caused by the failure of vital energy to follow the flow and the reverse flow of vital energy into the skin. White peony root can promote vital energy and licorice can restrain the reversed qi. Pain is also caused by the liver wood overcoming the spleen earth, so white peony root can attack the liver."
 Chen Xiuyuan: "Peony has a flat and descending Qi, and its bitter taste can purge blood and move blood. It is an attacking product, not a nourishing product. Abdominal pain caused by evil Qi, urinary incontinence and all kinds of pain are all diseases caused by Qi stagnation. The main treatment is to use bitter and flat herbs to purge Qi. Blood stasis means that blood is blocked and cannot flow, and in severe cases, it can cause cold and heat imbalance. Hard accumulation means that blood accumulates for a long time and becomes solid, and in severe cases, it can cause hernia, fullness and pain. These are all diseases caused by blood stagnation. The main treatment is to use bitter and flat herbs to move blood. It is also said that when the evil Qi is attacked and cleared, the original Qi will naturally benefit, not that peony can replenish Qi."