FlowersHemostaticFlos Sophorae

Huai Hua (Sophora Flower)

Q: What is Huai Hua? Are Huai Mi, Huai Jiao and black-locust flowers the same?

Official Huai Hua (槐花) is the dried flower and flower bud of Sophora japonica . The pharmacopoeial name is Sophorae Flos . Open flowers are called Huai Hua; unopened buds are Huai Mi —same monograph. Huai Jiao is the mature fruit: clears heat, drains fire, cools Blood, stops bleeding and moistens the intestines—not equal-weight buds. Black-locust flowers (Robinia) are a food flower, not pharmacopoeial Huai Hua. Write Huai Hua, Huai Mi or fried Huai Hua. Use caution in Spleen-Stomach vacuity cold.

Q: What are the TCM properties and traditional uses of Huai Hua?

According to the Chinese Pharmacopoeia, Huai Hua is bitter and slightly cold , enters the Liver and Large Intestine channels, and acts to cool the Blood and stop bleeding, clear the Liver and drain fire . It is used for blood in the stool, hemorrhoidal bleeding, bloody dysentery, flooding and spotting, vomiting of blood, nosebleed, Liver-heat red eyes, and headache with dizziness. Bitter and slightly cold, it suits Large-Intestine blood heat and Liver fire—not Spleen-Stomach vacuity cold, or yin-vacuity fever without excess fire.

Q: What is the usual dosage? Can it be drunk daily as a Liver-clearing blood-pressure tea?

The pharmacopoeial decoction dose is 5–10 g . It is not a four-season “Huai Hua blood-pressure tea.” Without excess fire, cold only injures the Stomach. Stool blood and hemorrhoidal bleeding need a practitioner to name a short course; it does not replace colonoscopy and blood-pressure assessment.

Q: How do you choose and store Huai Hua?

Choose plump buds (Huai Mi), yellowish-white, faint odor, slightly bitter-astringent, free of stems, mold and moths . Scattered browned petals mixed with black-locust flowers are discarded. Store dry against damp and moths. Buy pharmacopoeial Huai Hua; do not replace cooling Blood, stopping bleeding, clearing the Liver and draining fire with black-locust flowers or Huai Jiao by equal weight.

A practical guide to Huai Hua: 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	Flos Sophorae
Chinese Name & Pinyin	槐花 · Huai Hua
Medicinal Part	Flowers
The herb	Huai Hua / Huai Mi is the dried flower or bud of the pagoda tree. Huai Jiao is the fruit. Common forms: raw, dry-fried, and charred.
Nature and channels	Bitter, slightly cold. Enters the Liver and Large Intestine. Bitterness drains. Slight cold cools the blood and clears Liver fire.
Pharmacopoeia line	Cools the blood and stops bleeding. Clears the Liver and drains fire. Used for bloody stool, hemorrhoid bleeding, bloody dysentery, flooding, vomiting blood, nosebleed, Liver-heat red eyes, headache, and dizziness.
Pattern cues	Bloody stool and hemorrhoid bleeding. Bright-red blood. Red eyes and headache. Red tongue.
In this article	Flower versus bud and fruit. Huai Hua versus Ai Ye and Di Yu. Raw versus charred. Why a weak spleen should skip it. Why it is not a vein supplement. Who should skip it.

What Is Huai Hua?

Huai Hua (槐花; Huái Huā; Latin: Sophorae Flos; English: pagoda tree flower) is the dried flower and flower bud of Styphnolobium japonicum (L.) Schott (formerly Sophora japonica). In Chinese medicine it is a blood-cooling, bleeding-stopping herb. The bud is called Huai Mi. It is bitter and slightly cold, enters the Liver and Large Intestine channels, and its core actions are to cool the blood and stop bleeding, and to clear the Liver and drain fire. It is not Huai Jiao. That is the fruit; it cools blood, stops bleeding, and also moistens the intestines. It is not Ai Ye. Mugwort warms the channels and stops deficiency-cold bleeding. Huai Hua clears the Liver and cools blood-heat. Dry-fried Huai Hua and flower charcoal are slightly less cold and are used more to stop bleeding. A cold weak spleen and loose stools are contraindications. Western sophora extracts marketed around rutin do not convert to this official cooling-and-stopping dose.

It is used most often for three patterns:

Bloody stool, hemorrhoid bleeding, bloody dysentery — the blood is bright red
Blood-heat vomiting, nosebleed, or flooding
Liver-heat red eyes, headache, dizziness

The usual decoction dose is 5–10 g. Bitter and slightly cold, it is not a daily “clear-the-bowel pagoda tea.” Middle-cold loose stools and pale dark bleeding from deficiency-cold get worse if more cooling is added.

When blood-heat is in the Large Intestine, or Liver fire flames up, bright hemorrhoid bleeding, red eyes, and headache are common. Huai Hua is bitter-cold and draining. It cools, stops bleeding, and clears the Liver, which is why it appears in Huai Hua San. It drains more than it warms. An abdomen that likes warmth, a sallow face, and loose stools loosen further if more cold is added.

Huai Hua is not a catch-all bleeding or Liver herb. In deficiency-cold bloody stool or middle-cold diarrhea, using it alone can injure the stomach. Raw or charred should be decided by a licensed Chinese medicine practitioner after pattern diagnosis.

Huai Hua: Materia Medica Profile

Identification & Quality Standard

Flos Sophorae

Botanical Origin

The dried flower and flower bud of Sophora japonica L.(Fabacaea)

Production Regions

Primarily produced in the Chinese provinces of Henan, Hebei, Shanxi, Shandong.

Quality Requirements

Superior medicinal material is yellowish-green, large, tight.

Macroscopic Features

Wrinkled and rolled, petals often fell off; intact flower has bell-like calyx, yellowish-green; petal is yellowish white or yellow. Light in weight; slightly bitter taste. Flower bud (huai mi) is oval or elliptical shape, with yellowish-green calyx; top is yellowish-white patel of non-opened flower; externally yellowish-brown. Light in weight. Slightly bitter and astringent taste.

3 Sourcing and Quality Identification

Traditionally, the highest quality Huai Hua is sourced from the Hebei, Henan, and Shandong provinces.

Quality Indicators: Good quality raw Huai Hua appears as crumpled or loose white to yellowish-white flowers. It should have a faint, fresh fragrance and a slightly bitter taste. The processed Chao Huai Hua will look dark yellow with slight scorch marks and have a more pronounced roasted aroma.
Common Confusions: Be careful not to confuse it with Black Locust flowers, which are often pale pink, have a much stronger sweet scent, and possess entirely different medicinal properties.

Traditional Properties & Historical Lineage

Nature, Flavour & Channel Tropism

Bitter; Slightly coldLiverLarge Intestine

1. 2 Historical Records

Classic TCM texts have well-documented this herb's uses:

Ming Yi Bie Lu notes its use for treating hemorrhoids, skin sores, and blood in the stool.
Ben Cao Gang Mu adds that it can treat heat-related dysentery, clear heat toxins, and soothe skin conditions.
De Pei Ben Cao highlights the processing difference: stir-fried Huai Hua stops bleeding, while the raw form clears heat in the blood.

2. 3 Evolution of TCM Understanding

Over time, practitioners refined their understanding of Huai Hua.

Refining Usage: Ancient doctors realized it was excellent for "excess heat" conditions. Later, the emphasis on stir-frying emerged to make it safer for long-term astringent use.
Safety Precaution: Because of its cold nature, modern and historical practitioners agree that individuals with a cold, weak Spleen or Stomach should not use it alone. It must be paired with warming herbs to prevent digestive damage.

Core Efficacies & Traditional Applications

Traditional Functions

Cools blood, stops blood, clears the liver, drains fire. Apply to hemafecia due to intestinal wind, hemorrhoid hemorrhage, hematodiarrhea, hematuria, bloody stranguria, metrorrhagia and metrostaxis, hematemesis, non-traumatic hemorrhage, headache due to live fire, conjunctival congestion ans swellingpain, throat impediment, aphonia, abscess and sore.

1. 1 First Primary Action: Clearing Blood Heat

The primary traditional function of Huai Hua (Pagoda Tree Flower) is to clear excessive heat pathogens from the blood, addressing various discomforts caused by this "blood heat."

Common Symptoms: It is typically used for "excess heat" conditions manifesting as blood in the stool, hemorrhoid bleeding, or bloody urine. These are often accompanied by dry stools, dark and scanty urine, dry mouth, a bitter taste in the mouth, and irritability.
Common Pairings: It is frequently paired with herbs like Di Yu (Sanguisorba Root) and Huang Qin (Scutellaria Root) to boost its heat-clearing effects. If paired with Zhi Ke (Bitter Orange), it can help regulate the Large Intestine to relieve heat-induced constipation.
Caution: Individuals with a "deficiency-cold" Spleen and Stomach—those who frequently experience abdominal pain, diarrhea, or cold hands and feet—should avoid using it on their own, as its cold nature can worsen internal coldness.

2. 2 Second Primary Action: Astringent and Stopping Bleeding

Its secondary function is acting as an astringent to help reduce and stop bleeding, making it a valuable supportive herb for various bleeding conditions.

Common Symptoms: It is used for heat-induced bleeding, primarily in the lower body (like stool or urine), but can occasionally be used for coughing up blood or nosebleeds.
Common Pairings: For blood in the stool, it is often paired with Ce Bai Ye (Biota Leaf) and Jing Jie Sui (Schizonepeta Spike). For bloody urine, it pairs well with Xiao Ji (Field Thistle) and Bai Mao Gen (Lalang Grass Rhizome).
Caution: Bleeding caused by "deficiency-cold" (where the blood is pale and thin, accompanied by a pale face, cold extremities, and loose stools) should not be treated with this herb.

3. 3 Common Single Herb Pairing: The Herb Pair

A classic combination is Huai Hua (Pagoda Tree Flower) and Di Yu (Sanguisorba Root).

How They Work Together: Di Yu is slightly cold, sour, and bitter; it excels at cooling blood, stopping bleeding, and clearing toxins in the lower body. Meanwhile, Huai Hua is excellent at purging heat from the blood.
Application: Together, they strongly enhance the ability to clear lower-body heat and stop bleeding, making them a go-to for severe hemorrhoids or bloody stools. However, this powerful pair requires a professional TCM diagnosis to ensure it fits your specific condition.

Modern Research

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

1. 1 Key Chemical Components

Modern analysis shows that Huai Hua contains flavonoids (such as rutin, quercetin, and isorhamnetin), as well as triterpene saponins, sterols, and tannins.

Lab Observations: In test-tube studies, these flavonoids help inhibit inflammation. Animal studies suggest that the extracts may shorten bleeding time. However, there is currently a lack of robust human clinical trials to confirm its direct bleeding-control efficacy in people.

2. 2 Modern Pharmacological Focus

Current scientific research primarily explores the antioxidant and anti-inflammatory properties of its flavonoid components. Scientists are investigating how these extracts might protect vascular endothelial function (the lining of the blood vessels) and reduce oxidative stress, though these findings still require human validation.

3. 3 Limitations of Modern Research

When reading about modern studies on Huai Hua, it is important to keep a few things in mind:

Lab vs. Human Body: Results from petri dishes or animal models do not directly translate to human clinical results due to physiological differences.
Extracts vs. Whole Herbs: Using highly concentrated flavonoid extracts is fundamentally different from drinking a traditional Huai Hua herbal decoction in both dosage and absorption.
Dosage Discrepancies: Many lab studies use massive doses that far exceed normal human consumption, making it hard to draw a unified conclusion for daily use.
Synergy: The traditional efficacy of Huai Hua relies on the synergy of all its natural components working together, rather than the isolated action of a single chemical.

Comparing Similar Herbs

1. 2 Similarities with Comparable Herbs

When comparing Huai Hua (Pagoda Tree Flower) and Di Yu (Sanguisorba Root), we find several commonalities:

Both clear blood heat and act as astringents to stop bleeding.
Both are frequently used for lower gastrointestinal bleeding, such as hemorrhoids.
Both are cold in nature, meaning they must be used cautiously by anyone with a weak, cold digestive system.

2. 3 Core Differences

Properties and Flavor: Huai Hua is bitter and cold, focusing heavily on purging heat downwards. Di Yu is bitter, sour, and astringent, making its heat-clearing action slightly milder but its astringent (tissue-tightening) action stronger.
Primary Strengths: Huai Hua aims at the root cause by deeply clearing blood heat, which also helps relieve systemic symptoms like irritability and constipation. Di Yu focuses more directly on the bleeding site to reduce blood loss and is also great for healing skin sores or burns.
Symptom Focus: Huai Hua is best when heat symptoms are obvious (bright red blood, dry mouth). Di Yu is preferred when the bleeding is frequent or heavy, or when accompanied by swollen, painful hemorrhoids or skin ulcers.

3. 4 One-Sentence Summary

Simply put, Huai Hua is superior at deeply clearing blood heat, while Di Yu is stronger at physically astringing tissues to stop bleeding; they are complementary but not entirely interchangeable.

Classical Formulas Containing Huai Hua

Huai Hua San

槐花散

Formula CategoryBlood-Invigorating FormulasPrimary PatternBlood StasisPrimary FunctionClear intestines, stop bleeding, disperse windRelated ConditionsAbdominal Pain·Constipation

View Formula Profile Read Complete Guide

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 Tea or Dietary Application

Here are two low-risk ways to incorporate it at home:

Huai Hua Ju Hua Cha (Pagoda Tree Flower and Chrysanthemum Tea)
- Ingredients: 3g raw Huai Hua, 2g Ju Hua (Chrysanthemum).
- Method: Rinse both herbs, place in a cup, and steep with boiling water for 5 minutes.
- Best For: Summer heat causing dry mouth, irritability, or dry stools.
- Frequency: 1-2 times a week. Not for those with frequent diarrhea or a cold stomach.
Huai Hua Sheng Di Zhou (Pagoda Tree Flower and Rehmannia Porridge)
- Ingredients: 5g stir-fried Huai Hua, 5g Sheng Di (Raw Rehmannia Root), 50g rice.
- Method: Boil Sheng Di in water for 15 minutes, remove the herb, and use the liquid to cook the rice. Add the stir-fried Huai Hua 2 minutes before the porridge is done.
- Best For: Mild, heat-related blood in the stool.
- Frequency: Once every two weeks. Not for pregnant women or children.

2. 2 Preparation Differences

Raw vs. Stir-fried: Raw Huai Hua is stronger for clearing heat, making it better for active heat symptoms. Stir-fried Chao Huai Hua is milder and better at stopping bleeding, making it gentler for home use.
Cooking Rules: It does not require special pre-boiling or bagging. It can be brewed directly as a tea or cooked with foods.
Form Matters: A 3-gram dose of the raw dried herb is not the same as a commercial herbal extract capsule. Always follow specific product instructions or a practitioner's guide.

3. 3 Dosage and Usage Cycle

Standard Dosage: Clinical prescriptions range from 5-10g, but dietary home use should be smaller, around 3-5g.
Usage Cycle: Do not use continuously for more than 1 week. For long-term use, consult a practitioner.
Consultation: Pregnant women, nursing mothers, children, and those with liver or kidney issues must consult a professional before use.

Contraindications & Safety Warnings

1. 1 Not Suitable For

Digestive Coldness: People who frequently experience abdominal pain, diarrhea, or cold hands and feet should avoid it.
Vulnerable Groups: Pregnant and nursing women must be very cautious and only use it under professional guidance. Children and the elderly need strictly adjusted dosages.
Organ Dysfunction: Those with liver or kidney impairment should avoid self-medicating.
Allergies: Individuals allergic to legumes (beans, peas, etc.) might experience allergic reactions.
Special Medical Treatments: Anyone on blood thinners or undergoing chemotherapy must consult their doctor first.

2. 2 Drug Interactions and Dietary Notes

Medication Risks: Huai Hua may interact with blood thinners, blood pressure medications, or diabetes drugs, potentially altering their absorption or effects. Always consult your doctor or pharmacist.
Dietary Adjustments: When using this herb, avoid excessively spicy or greasy foods, as they generate more internal heat and counteract the herb's cooling benefits.

3. 3 Adverse Reactions and Risks

Overdose: While generally safe at normal doses, taking too much can cause gastrointestinal distress, such as stomach cramps or diarrhea.
Emergency Steps: If you experience allergic reactions (like rashes or itching), continuous vomiting, breathing difficulties, or rapid worsening of symptoms, stop use immediately and seek urgent medical attention.

Frequently Asked Questions About Huai Hua

What is Huai Hua? Are Huai Mi, Huai Jiao and black-locust flowers the same?

Official Huai Hua (槐花) is the dried flower and flower bud of Sophora japonica. The pharmacopoeial name is Sophorae Flos. Open flowers are called Huai Hua; unopened buds are Huai Mi—same monograph. Huai Jiao is the mature fruit: clears heat, drains fire, cools Blood, stops bleeding and moistens the intestines—not equal-weight buds. Black-locust flowers (Robinia) are a food flower, not pharmacopoeial Huai Hua. Write Huai Hua, Huai Mi or fried Huai Hua. Use caution in Spleen-Stomach vacuity cold.

What are the TCM properties and traditional uses of Huai Hua?

According to the Chinese Pharmacopoeia, Huai Hua is bitter and slightly cold, enters the Liver and Large Intestine channels, and acts to cool the Blood and stop bleeding, clear the Liver and drain fire. It is used for blood in the stool, hemorrhoidal bleeding, bloody dysentery, flooding and spotting, vomiting of blood, nosebleed, Liver-heat red eyes, and headache with dizziness. Bitter and slightly cold, it suits Large-Intestine blood heat and Liver fire—not Spleen-Stomach vacuity cold, or yin-vacuity fever without excess fire.

How do you choose raw versus fried Huai Hua? Can Huai Jiao replace it?

Clearing the Liver and draining fire more often use the raw flower. Cooling Blood, stopping bleeding, stool blood and hemorrhoidal bleeding more often use fried Huai Hua. Huai Jiao clears heat, drains fire and also moistens the intestines—useful for swollen hemorrhoids with constipation, but not an equal-weight hemostatic substitute. Do not treat black-locust salad flowers as the pharmacopoeial dose.

What is the usual dosage? Can it be drunk daily as a Liver-clearing blood-pressure tea?

The pharmacopoeial decoction dose is 5–10 g. It is not a four-season “Huai Hua blood-pressure tea.” Without excess fire, cold only injures the Stomach. Stool blood and hemorrhoidal bleeding need a practitioner to name a short course; it does not replace colonoscopy and blood-pressure assessment.

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

Use caution in Spleen-Stomach vacuity cold and in yin-vacuity fever without excess fire. Pregnancy with cooling Blood needs a practitioner’s assessment; it is not a calm-fetus herb. Stop if cold epigastric-abdominal pain and loose stool appear. Massive stool blood and syncope are emergencies.

Can Huai Hua cool Blood, stop bleeding and clear Liver fire?

It can help Large-Intestine blood heat and Liver fire flaming upward. Intestinal-wind stool blood and hemorrhoidal bleeding join Platycladus leaf, Schizonepeta spike and bitter orange in Huai Hua San. Liver-heat red eyes, headache and dizziness may join chrysanthemum and Prunella. It cools Blood, stops bleeding, clears the Liver and drains fire—not a specific for every hemorrhoid, every stool blood or every hypertension. Stool blood must exclude tumor and ulcer.

Can Huai Hua be drunk daily as a blood-pressure, Liver-clearing or hemorrhoid tea?

Stool blood, hemorrhoidal bleeding and Liver-heat red eyes may enter a short formula; Spleen vacuity only grows looser as it cools. “Huai Hua lowers pressure and treats hemorrhoids” does not replace blood-pressure and anorectal assessment. Cooling Blood, stopping bleeding, clearing the Liver and draining fire should name Huai Hua 5–10 g.

How do you choose among Huai Hua, Huai Jiao, Di Yu, Ce Bai Ye and Xiao Ji?

Sophora flower is bitter and slightly cold: cools Blood, stops bleeding, clears the Liver and drains fire—Large-Intestine fire with stool and hemorrhoidal bleeding. Sophora fruit is bitter-cold: clears heat, drains fire, cools Blood, stops bleeding and moistens the intestines—swollen hemorrhoids with constipation. Sanguisorba is bitter-sour and slightly cold: cools Blood, stops bleeding, resolves toxin and astringes sores—lower-burner bleeding. Platycladus leaf is bitter-astringent and slightly cold: cools Blood, stops bleeding, transforms phlegm, stops cough and darkens the hair. Field thistle is sweet-cool: cools Blood, stops bleeding, dissipates stasis and resolves toxin. Intestinal-wind hemorrhoidal bleeding often pairs Huai Hua with Ce Bai Ye (Huai Hua San); swollen hemorrhoids with constipation may use Huai Jiao; burns and astringing sores favor Di Yu; blood heat with stasis favors Xiao Ji. They may be paired; all warrant caution in Spleen-Stomach vacuity cold.

Which herbs is Huai Hua combined with? What are the representative formulas?

Intestinal-wind stool blood joins Platycladus leaf, Schizonepeta spike and bitter orange in Huai Hua San. Write Huai Hua or fried Huai Hua 5–10 g.

How do you choose and store Huai Hua?

Choose plump buds (Huai Mi), yellowish-white, faint odor, slightly bitter-astringent, free of stems, mold and moths. Scattered browned petals mixed with black-locust flowers are discarded. Store dry against damp and moths. Buy pharmacopoeial Huai Hua; do not replace cooling Blood, stopping bleeding, clearing the Liver and draining fire with black-locust flowers or Huai Jiao by equal weight.

Related Products

Nong's Huai Hua San (Sophora Flower Powder) 5:1 Concentrated Granules $54.46

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.