The difference between white peony and red peony is different in terms of drug source, flavor and attribution, efficacy, adverse reactions, contraindications and so on. 1. Drug source: white peony is the dried root of peony in the buttercup family; red peony is the dried root of peony in the buttercup family or Sichuan red peony. 2. Character and taste: white peony is bitter, sour, slightly cold in nature, and belongs to the liver and spleen meridians; red peony is bitter, slightly cold in nature, and belongs to the liver meridian. 3. Effects: White peony has the effects of nourishing blood and regulating menstruation (regulating menstrual disorders caused by blood deficiency), astringing yin and stopping sweating (astringing the yin fluid and reducing sweating), softening the liver and relieving pain (treating pains caused by yin deficiency of liver and liver-blood insufficiency), and calming the liver yang. Radix Paeoniae Alba is used for treating blood deficiency and yellowish color, menstrual disorders, night sweating (abnormal sweating after going to sleep and stopping sweating after waking up), chest and ribs pain, spasmodic pain in the limbs and headache and dizziness. Radix Paeoniae Radix is effective in clearing heat and cooling blood (relieving blood heat by clearing heat), dispersing blood stasis and relieving pain. It is mainly used for treating warm-heat spots (warm-heat poisonous evils invading the body resulting in spots and plaques on the skin), vomiting of blood caused by blood heat, swelling and pain of red eyes, carbuncle, swollen sores and ulcers, menstrual closure and dysmenorrhea, and bruises and injuries. 4. Adverse reactions: the adverse reactions of Paeonia lactiflora are occasional abdominal discomfort, abdominal pain, allergic reactions, etc.; the adverse reactions of Paeonia lactiflora are not clear. 5. Contraindications: white peony is a cold product, gas deficiency sweating (involuntary sweating during the day, a little sweat aggravated), Yang deficiency sweating is contraindicated, and should not be used with quinoa; red peony should not be used with quinoa, and should not be used with caution in patients with blood deficiency. Chinese medicine should be used under the guidance of a professional Chinese medicine practitioner, do not use medicine blindly to avoid adverse consequences.