Roots and rhizomesTonifyingPaeoniae Radix

Shao Yao (Peony Root)

Q: What is Shao Yao? Are Bai Shao and Chi Shao the same?

Classical “Shao Yao” usually means the root of Paeonia lactiflora . The modern Chinese Pharmacopoeia no longer lists Shao Yao as a single item; it lists Bai Shao (Paeoniae Radix Alba, cultivated, peeled) and Chi Shao (Paeoniae Radix Rubra, wild or red-peony species, with skin). Bai Shao is bitter-sour and slightly cold: nourishes Blood and softens the Liver. Chi Shao is bitter and slightly cold: clears heat, cools Blood and disperses stasis. Write Bai Shao or Chi Shao on the prescription.

Q: What are the TCM properties and traditional uses of Shao Yao?

Pharmacopoeial Bai Shao is bitter, sour and slightly cold , enters the Liver and Spleen channels, and acts to nourish Blood, regulate menstruation, constrain yin, stop sweating, soften the Liver, stop pain and calm Liver yang . Chi Shao is bitter and slightly cold , enters the Liver channel, and acts to clear heat, cool Blood, disperse stasis and stop pain . Bai Shao suits Blood vacuity with Liver hyperactivity; Chi Shao suits Blood-heat with stasis. Unsuitable in cold-damp diarrhea and yang vacuity.

Q: What is the usual dosage? Can it be drunk daily as a Blood tea?

The pharmacopoeial decoction dose is 6–15 g for Bai Shao and 6–12 g for Chi Shao. It is not a four-season “peony Blood tea.” Cold-damp diarrhea only loosens further as it cools. Abdominal pain and irregular menstruation need a practitioner to name a short course and to specify Bai Shao or Chi Shao.

Q: Which herbs is Shao Yao combined with? What are the representative formulas?

Blood-vacuity abdominal pain joins licorice in Shao Yao Gan Cao Tang . Blood heat may join moutan and raw rehmannia after pattern differentiation. Write Bai Shao or Chi Shao and the dose; do not replace one with the other by equal weight.

Q: How do you choose and store Shao Yao?

For Bai Shao choose cylindrical roots, nearly white or pale reddish-brown, a powdery-white cut surface, firm texture, a faint odor and a slightly bitter-sour taste . For Chi Shao choose cylindrical roots, brown, a powdery-white or pink cut surface, radiating texture, a faint aromatic odor and a slightly bitter-astringent taste . Moldy or dirty lots are discarded. Store dry. Buy pharmacopoeial Bai Shao or Chi Shao; do not mix them as substitutes for nourishing Blood and softening the Liver, or for clearing heat and cooling Blood.

A practical guide to Shao Yao: what it is, how Traditional Chinese Medicine uses it, the classical formulas it appears in, and who should be careful with it.

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Last reviewed Oct 13, 2026

Quick Facts

Latin Name	Paeoniae Radix
Chinese Name & Pinyin	芍藥 · Shao Yao
Medicinal Part	Roots and rhizomes
The herbs	Bai Shao is the boiled, peeled root of Paeonia lactiflora. Chi Shao is the unpeeled root of P. lactiflora or P. veitchii. Incompatible with Li Lu.
Nature and channels	Bai Shao: bitter, sour, slightly cold; Liver and Spleen. Chi Shao: bitter, slightly cold; Liver.
Pharmacopoeia line	Bai Shao nourishes blood and regulates the menses, astringes yin and stops sweating, softens the Liver and relieves pain, and calms Liver yang. Chi Shao clears heat and cools the blood, and dispels stasis and relieves pain.
Pattern cues	Bai Shao: blood deficiency, irregular menses, flank pain, spontaneous sweat. Chi Shao: macules, vomiting blood and nosebleed, stasis pain, amenorrhea.
In this article	Classical Shao Yao versus Bai Shao and Chi Shao. Nourishing blood versus cooling blood and dispelling stasis. Why they must not sit with Li Lu. Who should skip each.

What Is Shao Yao?

Shao Yao (芍药; Sháo Yào) is a classical name. The current pharmacopoeia does not list “Shao Yao” as one drug. It splits into Bai Shao and Chi Shao.

Bai Shao (白芍; Bái Sháo; Latin: Paeoniae Radix Alba) is the dried root of Paeonia lactiflora Pall., usually boiled and peeled. It is bitter, sour, and slightly cold, enters the Liver and Spleen channels, and its core actions are to nourish blood and regulate the menses, astringe yin and stop sweating, soften the Liver and relieve pain, and calm Liver yang. The teaching point is blood deficiency, Liver constraint, flank pain, and spontaneous sweat.

Chi Shao (赤芍; Chì Sháo; Latin: Paeoniae Radix Rubra) is the dried root of Paeonia lactiflora or Paeonia veitchii Lynch, usually unpeeled. It is bitter and slightly cold, enters the Liver channel, and its core actions are to clear heat and cool the blood, and to dispel stasis and relieve pain. The teaching point is heat entering the nutritive and blood, and pain from stasis.

Both are bitter and slightly cold. Bai Shao is sour and securing. It nourishes blood and softens the Liver. Chi Shao is bitter and draining. It cools the blood and dispels stasis. Do not treat them as interchangeable. Both are incompatible with Li Lu. Use caution with Chi Shao in pregnancy. Middle-cold diarrhea is a poor match for long use of either. Painful periods and macules need pattern diagnosis.

The usual split is:

Bai Shao — blood-deficiency sallow complexion, irregular menses, spontaneous sweat, flank pain, Liver-yang headache
Chi Shao — warm-toxin macules, vomiting blood and nosebleed, red eyes, amenorrhea from stasis, trauma
Classical “Shao Yao” — read the formula: Si Wu Tang and Xiao Yao San usually take Bai Shao; heat-clearing, blood-cooling formulas usually take Chi Shao

The usual decoction dose is 6–15 g for Bai Shao and 6–12 g for Chi Shao. Neither is a daily “menses peony” tea. Securing with Bai Shao when there is no blood deficiency, or dispersing with Chi Shao when there is no stasis-heat, is a poor match.

Shao Yao is not a single catch-all menses root. Bai Shao or Chi Shao should be decided by a licensed Chinese medicine practitioner after reading the formula and the pattern.

Shao Yao: Materia Medica Profile

Identification & Quality Standard

Paeoniae Radix

Botanical Origin

The dried root of Paeonia lactiflora Pall. (Paeoniaceae), used as Bai Shao when unbarked and processed, or as Chi Shao when the wild or red-barked root is used.

Production Regions

Bai Shao primarily produced in Zhejiang, Anhui and Sichuan; Chi Shao primarily produced in Inner Mongolia and Northeast China.

Quality Requirements

Superior medicinal material is solid, powdery, and of even diameter.

Macroscopic Features

Cylindrical roots, 10~20cm long; Bai Shao externally pale brownish-white after scraping; Chi Shao externally brownish-red. Fracture compact, pinkish-white to pink.

3 Native Regions and Quality Identification

While traditional texts highlight specific native regions, the actual quality depends on harvesting, processing, and storage.

Top Regions: Anhui, Shandong, Zhejiang, and Sichuan.
Spotting Good Quality: High-quality roots are cylindrical, evenly thick, smooth, and solid. The cross-section should be whitish or slightly brown, with a mildly bitter and sour scent.

Traditional Properties & Historical Lineage

Nature, Flavour & Channel Tropism

Bitter, Sour; Slightly coldLiverSpleen

1. 2 Historical Records

Ancient TCM masters highly valued this herb, though their writings reflect historical experience rather than modern clinical trials:

Shen Nong Ben Cao Jing ranked it as a medium-grade herb, noting its use for abdominal pain and clearing blood stagnation.
Ming Yi Bie Lu added that it helps smooth blood vessels and relieve water retention.
De Pei Ben Cao highlighted classic pairings, such as combining it with Gan Cao (Licorice Root) to relieve abdominal cramps.

2. 3 Evolution of Understanding

Over centuries, the medical understanding of Shao Yao (Peony) has broadened. Some ancient doctors focused on its ability to regulate Qi and relieve pain, while others emphasized its power to nourish Yin and blood, or even clear damp-heat. This versatility shows that while it is widely used, it is not a "cure-all" and must be prescribed based on a patient's specific TCM diagnosis.

Core Efficacies & Traditional Applications

Traditional Functions

Bai Shao nourishes blood, softens the liver, and relieves spasmodic pain. Chi Shao invigorates blood, dispels stasis, and cools blood. Apply according to the processed form used.

1. 1 Primary Focus: Harmonizing Qi and Blood

In Traditional Chinese Medicine (TCM), Shao Yao (Peony) is traditionally valued for its ability to harmonize Qi and blood, relieve spasms, and stop pain.

Common Symptoms: It is frequently used for conditions caused by blocked or irregular Qi and blood, such as rib and flank pain, menstrual cramps, and abdominal spasms. The pain might be fixed in one spot or move around, often worsening with emotional fluctuations.
Herbal Pairings: To boost its harmonizing effects, it is commonly paired with blood-nourishing herbs like Dang Gui (Chinese Angelica) and Chuan Xiong (Sichuan Lovage). For relieving abdominal cramps, it is often combined with Gan Cao (Licorice Root) to create a synergistic pain-relieving effect.
Caution: Do not use this herb alone for pain caused purely by Qi and blood deficiency (characterized by dull pain, fatigue, and pale complexion). It should also be avoided if you have a "cold" Spleen and Stomach with frequent diarrhea.

2. 2 Secondary Focus: Astringing Yin and Stopping Sweating

Shao Yao (Peony) also acts as an astringent to retain the body's Yin fluids and stop abnormal sweating.

Common Symptoms: It is great for "night sweats" (sweating while asleep, stopping upon waking) caused by Yin deficiency, often accompanied by hot palms/soles and a dry mouth. It can also help with "spontaneous sweating" (sweating easily during the day with little effort) caused by Qi deficiency.
Herbal Pairings: For night sweats, it is paired with Yin-nourishing herbs like Wu Wei Zi (Schisandra) and Mai Dong (Ophiopogon). For daytime sweating, it is mixed with Qi-boosting herbs like Huang Qi (Astragalus) and Bai Zhu (Atractylodes).
Caution: If you have an active "wind-cold" condition (like a fresh cold with chills, fever, and no sweating), do not use this astringent herb. It can "close the door on the thief," trapping the cold pathogen inside your body.

3. 3 Common Herbal Pairings: Classic Combinations

The most famous herbal pair is Shao Yao (Peony) and Gan Cao (Licorice Root).

How They Work Together: Shao Yao harmonizes blood and relieves spasms, while Gan Cao gently tonifies the middle and relieves pain. Together, they powerfully relax muscles and stop cramping, especially for abdominal or limb spasms.
Note: A practitioner must balance the dosage based on your specific syndrome. Do not mix and match them casually on your own.

Modern Research

Modern research offers useful context, but Traditional Chinese Medicine prescribes on whole-pattern diagnosis rather than isolated compounds.

1. 1 Main Chemical Compounds

Modern science has identified several compounds in the plant, including paeoniflorin, gallic acid, and volatile oils. Paeoniflorin is one of the most prominent components. While lab tests show potential anti-inflammatory properties, these are strictly laboratory observations and do not automatically guarantee the same results in the human body.

2. 2 Modern Pharmacological Focus

Current scientific research on Shao Yao (Peony) mostly looks at its isolated active ingredients. Studies are exploring its potential to regulate the immune system, improve circulation, and reduce inflammation. However, these are largely preliminary findings that require more human clinical trials.

3. 3 Limitations of Modern Research

It is important to view modern studies with a balanced perspective:

Lab vs. Real Life: Results from test tubes and animal models cannot be directly applied to human health.
Extracts vs. Whole Herbs: Modern labs often use highly concentrated, single-chemical extracts (like pure paeoniflorin). This is completely different from drinking a traditional tea made from whole Shao Yao (Peony) slices.
Synergy: In TCM, the herb's healing power comes from the complex interaction of all its natural compounds working together, which single-chemical studies often miss.

Comparing Similar Herbs

1. 2 Common Ground

Both herbs can relieve spasms and pain. They both help regulate Qi and blood-related issues and are staple ingredients in formulas designed to support the Spleen and Stomach.

2. 3 Core Differences

Properties: Bai Shao is slightly cold, sour, and bitter; it acts as an astringent and cooling tonic. Gan Cao is neutral and sweet; it is gentle, tonifying, and harmonizes the whole body.
Core Strengths: Bai Shao excels at harmonizing blood, astringing Yin (stopping sweats), and relieving rib/abdominal pain. Gan Cao excels at tonifying Spleen Qi and harmonizing the harsh properties of other herbs in a formula.
Action Direction: Bai Shao pulls inward (astringes) to prevent fluid loss and smooths out stagnation. Gan Cao gently boosts and balances the body's overall energy flow.
Contraindications: Bai Shao is bad for those with a cold, weak stomach and diarrhea. Gan Cao is bad for those with severe dampness or water retention (edema), as large amounts can increase bloating and blood pressure.

3. 4 Summary of Differences

In short: Bai Shao focuses on pulling inward to harmonize blood and stop sweating/pain, while Gan Cao focuses on tonifying Qi and harmonizing other medicinal herbs.

Classical Formulas Containing Shao Yao

Formulas vs. Single Herbs

Synergy is Key: A formula is a balanced team. The healing power comes from how the herbs interact, so a single herb cannot simply replicate a full formula's effects.
Holistic Balance: The exact dosage and combination in a formula affect the entire body. Never try to mix or alter these formulas at home based on internet articles.

Diet & Daily Home Use

1. 1 Home Recipes and Teas

Shao Yao and Red Date Tea:
- Ingredients: 3g Chao Shao Yao (Stir-fried Peony), 2 pitted red dates.
- Method: Brew with boiling water, cover, and steep for 10 minutes.
- Best For: Mild rib discomfort and cold hands/feet due to irregular Qi and blood.
- Caution: Not for those with chronic diarrhea or severe Yin deficiency with "fire" (extreme dry mouth). Drink 1-2 times a week max.
Shao Yao and Lily Porridge:
- Ingredients: 5g Sheng Shao Yao (Raw Peony), 5g lily bulb, 50g rice.
- Method: Wrap the herb in cheesecloth and boil with the lily and rice to make porridge. Remove the herb bag before eating.
- Best For: Mild night sweats and dry mouth.
- Caution: Do not eat if you have an active cold or a weak, cold stomach. Limit to once every two weeks.

2. 2 Preparation Differences

Raw vs. Stir-fried: Sheng Shao Yao (Raw Peony) is colder and better for Yin deficiency with heat. Chao Shao Yao (Stir-fried Peony) is much milder and safer for a weaker digestive system.
Brewing: When making a decoction at home, simply boil it with your other herbs for 20 to 30 minutes. It does not require special pre-boiling. (Note: Herbal slices and modern extracts are dosed completely differently and cannot be swapped directly).

3. 3 Dosage and Usage Cycle

Dosage: Clinical doses range from 6 to 15g, but home dietary doses should be much smaller (3 to 5g).
Duration: Do not use it continuously for long periods. Dietary use should not exceed 2 weeks. If symptoms persist, see a doctor.

Contraindications & Safety Warnings

1. 1 Who Should Avoid It?

Cold Spleen/Stomach: If you frequently experience loose stools or diarrhea, avoid this herb, as it can worsen digestion.
Special Populations: Pregnant and nursing women, children, and the elderly should only use this under strict medical supervision.
Organ Issues: Those with abnormal liver or kidney function should consult a doctor first.
Allergies: Do not use if you are allergic to plants in the buttercup family.

2. 2 Drug Interactions and Dietary Notes

Medications: Shao Yao (Peony) may interact with blood thinners (anticoagulants), altering their effectiveness. It might also have synergistic or antagonistic effects with blood pressure, blood sugar, and sedative medications (potentially causing excess drowsiness). Always ask your doctor if you are on chronic medications.
Diet: While there are no universal "food clashes," keep your diet simple and light when using herbal remedies.

3. 3 Adverse Reactions and Overdose Risks

Side Effects: It is generally safe at standard doses. However, taking too much can cause stomach pain, nausea, and diarrhea. Rare allergic reactions include rashes and itching.
Action Plan: If you experience severe discomfort, allergic reactions, breathing issues, or rapid worsening of your condition, stop using it immediately and seek medical help.

Frequently Asked Questions About Shao Yao

What is Shao Yao? Are Bai Shao and Chi Shao the same?

Classical “Shao Yao” usually means the root of Paeonia lactiflora. The modern Chinese Pharmacopoeia no longer lists Shao Yao as a single item; it lists Bai Shao (Paeoniae Radix Alba, cultivated, peeled) and Chi Shao (Paeoniae Radix Rubra, wild or red-peony species, with skin). Bai Shao is bitter-sour and slightly cold: nourishes Blood and softens the Liver. Chi Shao is bitter and slightly cold: clears heat, cools Blood and disperses stasis. Write Bai Shao or Chi Shao on the prescription.

What are the TCM properties and traditional uses of Shao Yao?

Pharmacopoeial Bai Shao is bitter, sour and slightly cold, enters the Liver and Spleen channels, and acts to nourish Blood, regulate menstruation, constrain yin, stop sweating, soften the Liver, stop pain and calm Liver yang. Chi Shao is bitter and slightly cold, enters the Liver channel, and acts to clear heat, cool Blood, disperse stasis and stop pain. Bai Shao suits Blood vacuity with Liver hyperactivity; Chi Shao suits Blood-heat with stasis. Unsuitable in cold-damp diarrhea and yang vacuity.

How do you choose Bai Shao versus Chi Shao? Can they replace each other?

White peony leans to supplementing, constraining, softening the Liver and nourishing Blood. Red peony leans to draining, dispersing, cooling Blood and dispersing stasis. They cannot replace each other by equal weight. Dry-fried white peony lessens cold and leans to nourishing Blood; raw red peony is stronger for clearing heat. Commercial peony tea must state white or red.

What is the usual dosage? Can it be drunk daily as a Blood tea?

The pharmacopoeial decoction dose is 6–15 g for Bai Shao and 6–12 g for Chi Shao. It is not a four-season “peony Blood tea.” Cold-damp diarrhea only loosens further as it cools. Abdominal pain and irregular menstruation need a practitioner to name a short course and to specify Bai Shao or Chi Shao.

What are the contraindications? Can it be used in pregnancy?

Unsuitable in cold-damp diarrhea and yang vacuity. Chi Shao moves Blood; use caution in pregnancy. Stop if diarrhea appears or abdominal pain worsens. Severe abdominal pain and bleeding need medical care.

Can Shao Yao nourish Blood and soften the Liver, or clear heat and cool Blood?

Bai Shao can help Blood-vacuity abdominal pain and Liver-yang headache. It joins licorice in Shao Yao Gan Cao Tang. Chi Shao can help Blood-heat with stasis. It joins moutan and raw rehmannia. It is not a specific for every abdominal pain or every irregular menstruation.

Can Shao Yao be drunk daily as a Blood, pain or menstruation tea?

Blood vacuity with Liver hyperactivity may use Bai Shao short-term; cold-damp only loosens further as it cools. “Peony must nourish Blood” does not replace assessment. Nourishing Blood and softening the Liver should name Bai Shao 6–15 g; clearing heat and cooling Blood should name Chi Shao 6–12 g.

How do you choose among Bai Shao, Chi Shao, Dang Gui, Dan Pi and Gan Cao?

White peony is bitter-sour and slightly cold: nourishes Blood, regulates menstruation, constrains yin, stops sweating, softens the Liver, stops pain and calms Liver yang—Blood-vacuity abdominal pain. Red peony is bitter and slightly cold: clears heat, cools Blood, disperses stasis and stops pain—Blood-heat with stasis. Chinese angelica is sweet-acrid and warm: supplements and moves Blood, regulates menstruation and stops pain—Blood-vacuity scanty menses. Moutan is bitter-acrid and slightly cold: clears heat, cools Blood, moves Blood and transforms stasis—Blood-heat macules. Licorice is sweet-neutral: harmonizes the formula and relaxes urgency to stop pain; with white peony it treats abdominal pain. Blood vacuity favors Bai Shao (Shao Yao Gan Cao Tang); Blood heat favors Chi Shao; scanty menses favors Dang Gui; macules favor Dan Pi; urgency favors Gan Cao. They may be paired after pattern differentiation; cold-damp forbids large Bai Shao and Chi Shao.

Which herbs is Shao Yao combined with? What are the representative formulas?

Blood-vacuity abdominal pain joins licorice in Shao Yao Gan Cao Tang. Blood heat may join moutan and raw rehmannia after pattern differentiation. Write Bai Shao or Chi Shao and the dose; do not replace one with the other by equal weight.

How do you choose and store Shao Yao?

For Bai Shao choose cylindrical roots, nearly white or pale reddish-brown, a powdery-white cut surface, firm texture, a faint odor and a slightly bitter-sour taste. For Chi Shao choose cylindrical roots, brown, a powdery-white or pink cut surface, radiating texture, a faint aromatic odor and a slightly bitter-astringent taste. Moldy or dirty lots are discarded. Store dry. Buy pharmacopoeial Bai Shao or Chi Shao; do not mix them as substitutes for nourishing Blood and softening the Liver, or for clearing heat and cooling Blood.

Medical Disclaimer — This article is provided for educational purposes only and describes traditional Chinese medicine concepts. It is not medical advice, and it is not intended to diagnose, treat, cure or prevent any disease. Always consult a qualified practitioner before using any herb, particularly if you are pregnant, nursing, taking medication or managing a diagnosed condition.