Roots and rhizomesHeat-clearingRadix Trichosanthis

Tian Hua Fen (Trichosanthes Root)

Q: What is Tian Hua Fen? Are Gua Lou, Gua Lou Pi, Gua Lou Ren and Gua Lou Gen the same?

Official Tian Hua Fen (天花粉) is the dried root of Trichosanthes kirilowii or T. rosthornii . The pharmacopoeial name is Trichosanthis Radix , also called Gua Lou Gen. Gua Lou is the fruit of the same plant, Gua Lou Pi the peel and Gua Lou Ren the seed: they clear heat, transform phlegm, loosen the chest and moisten the intestines—not the fluid-generating, pus-expelling root. Same plant, different parts—not equal substitutes. Write Tian Hua Fen or Gua Lou Gen; do not dispense Gua Lou. Do not combine with aconite.

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

According to the Chinese Pharmacopoeia, Tian Hua Fen is sweet, slightly bitter and slightly cold , enters the Lung and Stomach channels, and acts to clear heat and drain fire, generate fluid and stop thirst, and disperse swelling and expel pus . It is used for heat disease with vexing thirst, Lung-heat dry cough, internal-heat wasting-thirst, and sores and swollen toxin. Sweet-cold generates fluid, slightly bitter drains fire—suited to heat injuring fluid and hot toxic sores, not to Spleen-Stomach deficient cold, loose stool or pregnancy.

Q: What is the usual dosage? Can it be drunk daily as a blood-sugar or fluid-generating tea?

The pharmacopoeial decoction dose is 10–15 g . It is not a four-season “pollen sugar tea.” Spleen vacuity with loose stool and absence of heat only grow more diarrheal. Heat-thirst, wasting-thirst and sores need a practitioner to name a short course. It must not be a daily tea in pregnancy.

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

Use with caution in pregnancy (explicit in the Pharmacopoeia; most authorities forbid it in pregnancy). Unsuitable in Spleen-Stomach deficient cold and loose diarrhea. Do not combine with Chuan Wu, processed Chuan Wu, Cao Wu, processed Cao Wu or Fu Zi. Use caution in allergy. Stop and seek care if abdominal pain or rash appears.

Q: How do you choose and store Tian Hua Fen?

Choose large white or pale-yellow pieces, a starchy fracture with radiating wood, faint odor and a slightly bitter taste . Gray-black withered, moldy, moth-eaten and poorly starchy lots are discarded. Keep closed, cool and dry against moths. Buy pharmacopoeial Tian Hua Fen; do not replace clearing heat, generating fluid and expelling pus with Gua Lou or bee pollen by equal weight.

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

View Herb Profile →

Last reviewed Oct 13, 2026

Quick Facts

Latin Name	Radix Trichosanthis
Chinese Name & Pinyin	天花粉 · Tian Hua Fen
Medicinal Part	Roots and rhizomes
The herb	Tian Hua Fen is the dried root of Trichosanthes kirilowii or T. rosthornii. Gua Lou Pi and Gua Lou Zi are fruit parts. Use official pieces, not unlabeled “pollen powder.”
Nature and channels	Sweet, slightly bitter, slightly cold. Enters the Lung and Stomach. Sweetness generates fluids. Slight bitterness and cold clear heat and reduce swelling.
Pharmacopoeia line	Clears heat and drains fire. Generates fluids and stops thirst. Reduces swelling and discharges pus. Used for febrile thirst, Lung-heat dry cough, interior-heat wasting-thirst, and sores.
Pattern cues	Vexing thirst. Wasting-thirst. Lung-heat dry cough. Swollen sores. Red tongue with little fluid.
In this article	Tian Hua Fen versus Gua Lou Pi, Mai Dong, and Lu Gen. Root versus fruit. Why pregnancy is a stop sign. Who should skip it.

What Is Tian Hua Fen?

Tian Hua Fen (天花粉; Tiān Huā Fěn; Latin: Trichosanthis Radix; English: trichosanthes root / snakegourd root) is the dried root of Trichosanthes kirilowii Maxim. or Trichosanthes rosthornii Harms. In Chinese medicine it is a heat-clearing, fire-draining herb. It is sweet, slightly bitter, and slightly cold, enters the Lung and Stomach channels, and its core actions are to clear heat and drain fire, generate fluids and stop thirst, and reduce swelling and discharge pus. It is not Gua Lou Pi or Gua Lou Zi. The peel clears the Lung, transforms phlegm, and eases the chest. The seed moistens the intestines and washes phlegm. The root clears Lung and Stomach heat, generates fluids, and reduces swelling. The “fen” in the name is not a snack starch, and it is not kitchen arrowroot. Avoid in pregnancy.

It is used most often for three patterns:

Febrile thirst / interior-heat wasting-thirst — thirst, vexing heat
Lung-heat dry cough — dry cough, sticky sputum
Sores and swellings — heat-toxin not yet open, or pus that will not discharge

It is usually used raw. The usual decoction dose is 10–15 g. A cold weak spleen and loose stools are a caution. Sweet-cold and moistening, it is not a daily “fluid powder.” Anyone allergic to trichosanthes protein should not use it.

When heat damages Lung and Stomach fluids, or heat-toxin gathers, thirst, dry cough, and swollen sores are common. Tian Hua Fen is sweet-cold. It clears, moistens, and dissipates, which is why it appears in wasting-thirst and sore-toxin formulas. It moistens and clears more than it warms. A cold middle that wants hot drinks loosens further if more cooling is added.

Tian Hua Fen is not a catch-all thirst or sore herb. In pregnancy, spleen-deficiency loose stools, or thirst with no heat, using it alone can injure the middle. Whether it belongs in a formula should be decided by a licensed Chinese medicine practitioner after pattern diagnosis.

Tian Hua Fen: Materia Medica Profile

Identification & Quality Standard

Radix Trichosanthis

Botanical Origin

The dried root of Trichosanthes kirilowii Maxim.(Cucurbitaceae)

Production Regions

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

Quality Requirements

Superior medicinal material is fat and large, white, firm, powdery and with lack of ‘veins” on fractured surface.

Macroscopic Features

Irregular cylindrical, fusiform, or petal-like lumps, 8~16cm long, 1.5~5.5cm diameter. Externally yellowish-white or pale brownish-yellow, with longitudinal wrinkles, thin root scars and slightly indented horizontal long lenticels, sometimes with remnants of yellowish-brown outer skin. Firm texture, fractured surface is white or pale yellow, powdery, horizontal cut surface has yellow xylem, ‘veins’ slightly arranged in radial pattern, longitudinal cut surface has yellow longitudinal linear xylem. faint odor, slightly bitter taste.

Sourcing and Quality Identification

Historically, high-quality Tian Hua Fen comes from regions like Henan and Shandong, though quality ultimately depends on harvesting time and processing.

Appearance: Premium raw roots are cylindrical, pale yellow-white on the outside, and bright white on the inside.
Texture: A good root is highly starchy (powdery) with visible yellow veins. Processed versions are darker and firmer.
Don't Confuse It: It can sometimes be mixed up with roots from similar plants. The fakes are usually much harder and lack the distinctive powdery, starchy texture of true Tian Hua Fen.

Traditional Properties & Historical Lineage

Nature, Flavour & Channel Tropism

Sweet, Slightly bitter; Slightly coldLungStomach

1. Historical Records

This herb has a long history of addressing heat and fluid deficiency:

Shen Nong Ben Cao Jing recorded its use for wasting-thirst, severe body heat, and restlessness.
Ming Yi Bie Lu noted its ability to clear deep-seated gastrointestinal heat, treat dry mouth and lips, and regulate fluids.
Ben Cao Gang Mu highlighted its secondary function: clearing swelling and toxins, draining pus, and relieving pain from sores.

2. Evolution of TCM Understanding

Over time, TCM physicians refined their understanding of this root. Most prioritize its ability to clear heat and generate fluids, making it a staple for conditions where heat has dried out the body's natural moisture. Others value its ability to clear toxic heat and reduce swelling in the skin.

However, modern practitioners agree on a key caution: because of its cooling nature, it should not be used long-term by people with "Cold-Deficient" Spleen and Stomach issues, as it could further damage their digestive warmth.

Core Efficacies & Traditional Applications

Traditional Functions

Clears heat, drains fire, engenders fluid, stops thirst, expels pus, eliminates swelling. Apply to thirst due to heat, diabetes, jaundice, hemoptysis due to dryness of lung, swelling abscess, hemorrhoid fistula. As for apply to diabetes, often combined with medicinal material, which can nourish yin, to achieve the effect.

1. Primary Focus: Clearing Heat and Generating Fluids

Traditional Function: Tian Hua Fen (Trichosanthes Root) is primarily used to clear heat and replenish body fluids. It is highly effective for relieving thirst and dryness.
Target Symptoms: Ideal for a dry mouth, sore throat, and a red tongue lacking moisture due to heat damaging the body's fluids.
Common Pairings: It is often paired with Mai Dong (Ophiopogon Tuber) or Lu Gen (Reed Rhizome) to boost hydration. For heat mixed with Qi deficiency, it can be combined with Ginseng.
When to Avoid: If you have a "Cold-Deficient" Spleen and Stomach (e.g., frequent loose stools), do not use this herb without supervision, as its cooling nature can worsen digestive issues.

2. Secondary Focus: Clearing Swelling and Draining Pus

Traditional Function: It helps reduce toxic heat swelling and promotes the drainage of pus.
Target Symptoms: Used for painful, red, and swollen skin boils, or when pus is slow to drain from a sore.
Common Pairings: Often combined with Jin Yin Hua (Honeysuckle Flower) or Pu Gong Ying (Dandelion) to clear toxic heat.
When to Avoid: Do not use for "Yin-type" sores (which are pale, chronic, and not very painful), as the cold nature of the herb can cause the infection to stagnate further.

3. Common Herb Pairings: Synergistic Duos

A classic pairing is Tian Hua Fen and Bei Mu (Fritillaria Bulb).
Why it works: Tian Hua Fen clears heat and swelling, while Bei Mu dissolves phlegm and stops coughs. Together, they are excellent for dry, heat-related coughs or stubborn sores. Always use under professional guidance.

Modern Research

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

(Note: Modern research on TCM herbs usually involves isolated compounds in lab settings, which differs from how traditional whole herbs are brewed and consumed.)

1. Main Chemical Components

Modern analysis shows that Tian Hua Fen contains trichosanthin (a specific protein), polysaccharides, amino acids, and sterols. Preliminary lab and animal tests show that some of these components can influence cellular activity, but comprehensive human clinical trials are still limited.

2. Modern Pharmacological Focus

Current scientific research primarily focuses on how the components of this root might regulate metabolic functions. While animal models show potential, more robust human studies are needed to confirm these effects in everyday use.

3. Limitations of Modern Research

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

Lab vs. Real Life: Results in a petri dish or animal model do not automatically translate to human digestion.
Dosage Differences: Highly concentrated lab extracts do not act the same way as a traditional water-boiled decoction.
Holistic Synergy: TCM formulas rely on multiple herbs working together. Isolating one protein or compound misses the balanced, whole-plant effect that traditional medicine relies on.

Comparing Similar Herbs

1. Shared Traits with Similar Herbs

Tian Hua Fen and Lu Gen (Reed Rhizome) both clear heat and generate fluids.
Both are used for symptoms of dryness and heat, and both require caution regarding dosage and your personal digestive strength.

2. Core Differences

Properties: Tian Hua Fen is slightly cold and focuses on moistening and reducing swelling. Lu Gen is colder and focuses on clearing heat and stopping nausea.
Strengths: Tian Hua Fen is the expert at clearing heat while draining pus. Lu Gen is better at settling stomach heat and stopping vomiting.
Best Used For: Choose Tian Hua Fen for dryness mixed with phlegm or skin sores. Choose Lu Gen for heat accompanied by irritability or nausea.

3. A One-Sentence Summary

Tian Hua Fen is best for moistening dryness and clearing swollen sores, while Lu Gen excels at clearing heat and stopping heat-induced vomiting.

Classical Formulas Containing Tian Hua Fen

Yu Quan San

玉泉散

Formula CategoryYin-Tonifying FormulasPrimary PatternYin DeficiencyPrimary FunctionGenerate fluids, stop thirst, tonify QiRelated ConditionsDry Mouth & Throat

View Formula Profile Read Complete Guide

Sha Shen Mai Dong Tang

沙參麥冬湯Assistant

Formula CategoryYin-Tonifying FormulasPrimary PatternYin DeficiencyPrimary FunctionNourish Lung-Stomach Yin, generate fluidsRelated ConditionsDry Cough·Yin Deficiency Constitution·Dry Mouth & Throat

View Formula Profile Read Complete Guide

Xian Fang Huo Ming Yin

仙方活命飲

Formula CategoryHeat-Clearing FormulasPrimary PatternDamp-HeatPrimary FunctionClear heat, resolve toxin, reduce swelling, invigorate blood, stop painRelated ConditionsFever·Sore Throat

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. Home Herbal Teas and Meals

Tian Hua Fen & Lu Gen Tea:
- Ingredients: 3g Tian Hua Fen, 5g Lu Gen.
- Method: Steep in boiling water for 10 minutes.
- Best For: Summer heat causing dry mouth and mild throat irritation (drink 2-3 times a week).
- Avoid If: You have a weak/cold stomach or loose stools.
Tian Hua Fen & Mai Dong Porridge:
- Ingredients: 5g Tian Hua Fen, 5g Mai Dong, 50g rice.
- Method: Boil the herbs in water for 20 minutes. Remove the herbs and use the infused water to cook the rice into a porridge.
- Best For: Chronic dryness and a red, dry tongue (eat once every 1-2 weeks).

2. Preparation Differences

Raw Tian Hua Fen is best for clearing heat and draining pus. Processed versions are milder and easier on the stomach.
Always use pharmacy-grade herbs, and remember that dosages for raw herbs, teas, and concentrated extracts do not translate equally.

3. Dosage and Usage Cycles

Dosage: Clinical prescriptions usually range from 10-15g. For home dietary use, stick to a much lower dose of 3-5g.
Duration: Do not use it continuously for long periods. Take breaks to prevent the cooling nature from damaging your digestion.

Contraindications & Safety Warnings

1. Who Should Avoid It

Weak Digestion: Avoid if you have a cold stomach or chronic diarrhea.
Pregnancy & Nursing: Strict medical supervision is required.
Allergies: Avoid if you are allergic to plants in the gourd family.
Organ Health: Those with liver or kidney dysfunction should consult a doctor first.

2. Medication Interactions and Dietary Notes

Interactions: This herb may interact with blood thinners, blood pressure medications, or diabetes drugs. Always inform your doctor or pharmacist if you are combining TCM with western medications.

3. Adverse Reactions and Overdose

Mild side effects can include stomach upset or diarrhea.
Warning: If you experience severe gastrointestinal distress, allergic reactions, vomiting, or breathing difficulties, stop using it immediately and seek emergency medical care.

Frequently Asked Questions About Tian Hua Fen

What is Tian Hua Fen? Are Gua Lou, Gua Lou Pi, Gua Lou Ren and Gua Lou Gen the same?

Official Tian Hua Fen (天花粉) is the dried root of Trichosanthes kirilowii or T. rosthornii. The pharmacopoeial name is Trichosanthis Radix, also called Gua Lou Gen. Gua Lou is the fruit of the same plant, Gua Lou Pi the peel and Gua Lou Ren the seed: they clear heat, transform phlegm, loosen the chest and moisten the intestines—not the fluid-generating, pus-expelling root. Same plant, different parts—not equal substitutes. Write Tian Hua Fen or Gua Lou Gen; do not dispense Gua Lou. Do not combine with aconite.

What are the TCM properties and traditional uses of Tian Hua Fen?

According to the Chinese Pharmacopoeia, Tian Hua Fen is sweet, slightly bitter and slightly cold, enters the Lung and Stomach channels, and acts to clear heat and drain fire, generate fluid and stop thirst, and disperse swelling and expel pus. It is used for heat disease with vexing thirst, Lung-heat dry cough, internal-heat wasting-thirst, and sores and swollen toxin. Sweet-cold generates fluid, slightly bitter drains fire—suited to heat injuring fluid and hot toxic sores, not to Spleen-Stomach deficient cold, loose stool or pregnancy.

How is the decoction piece used? Is it a “pollen” supplement?

Cut thick slices or chunks into the decoction. The “fen / powder” in the name refers to the root’s starchy fracture—not bee pollen and not cosmetic starch. Externally it may be powdered and applied to sores. Do not mix it with Gua Lou, and do not place it in the same formula as Chuan Wu, Cao Wu or Fu Zi.

What is the usual dosage? Can it be drunk daily as a blood-sugar or fluid-generating tea?

The pharmacopoeial decoction dose is 10–15 g. It is not a four-season “pollen sugar tea.” Spleen vacuity with loose stool and absence of heat only grow more diarrheal. Heat-thirst, wasting-thirst and sores need a practitioner to name a short course. It must not be a daily tea in pregnancy.

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

Use with caution in pregnancy (explicit in the Pharmacopoeia; most authorities forbid it in pregnancy). Unsuitable in Spleen-Stomach deficient cold and loose diarrhea. Do not combine with Chuan Wu, processed Chuan Wu, Cao Wu, processed Cao Wu or Fu Zi. Use caution in allergy. Stop and seek care if abdominal pain or rash appears.

Can Tian Hua Fen generate fluid, stop thirst and expel pus?

It can help heat injuring fluid and hot toxic swelling. Wasting-thirst with vexing thirst joins Coptis, raw Rehmannia and Ophiopogon in Xiao Ke-type formulas. Lung-heat dry cough joins Glehnia, Ophiopogon and Fritillaria. Sores and swollen toxin join angelica, honeysuckle, Angelica dahurica and others in Xian Fang Huo Ming Yin. It clears Lung-Stomach while generating fluid and expelling pus—not a specific for every thirst, every diabetes or every boil. High fever with coma and collapsing abscess are emergencies.

Can Tian Hua Fen be drunk daily as a beauty, sugar-lowering or Lung-clearing tea?

Heat-thirst, Lung dryness and early sores may enter a short formula; Spleen vacuity without heat only grows colder. “Pollen whitens and lowers sugar” does not replace endocrine and surgical assessment. Clearing heat and generating fluid should name Tian Hua Fen (not Gua Lou, not bee pollen) and a 10–15 g dose; it is forbidden in pregnancy.

How do you choose among Tian Hua Fen, Gua Lou, Zhi Mu, Lu Gen and Mai Dong?

Trichosanthes root is sweet, slightly bitter and slightly cold: clears heat, drains fire, generates fluid, stops thirst, disperses swelling and expels pus—clears Lung-Stomach while also expelling pus. Trichosanthes fruit is sweet-cold: clears heat, washes phlegm, loosens the chest and moistens the intestines—chest-diaphragm phlegm-heat. Anemarrhena is bitter-sweet-cold: clears heat, drains fire, enriches Yin and moistens dryness—clears while moistening the Kidney. Reed rhizome is sweet-cold: clears heat, generates fluid, eliminates vexation, stops vomit and promotes urination—qi-aspect heat-thirst. Ophiopogon is sweet, slightly bitter and slightly cold: nourishes Yin, moistens the Lung, benefits the Stomach and clears the Heart—Yin damage with little phlegm. Heat-thirst with sores favors Tian Hua Fen; chest oppression with phlegm-heat favors Gua Lou; Yangming vigorous heat favors Zhi Mu; heat disease injuring fluid favors Lu Gen and Mai Dong. They may be paired; all are wrong as pure cold-moistening in Spleen-Stomach deficient cold; Gua Lou and Tian Hua Fen must not be treated as the same article; none should be combined with aconite.

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

Heat-toxin sores join angelica, honeysuckle, red peony, Angelica dahurica, Fritillaria, Saposhnikovia and licorice in Xian Fang Huo Ming Yin. Wasting-thirst with vexing thirst joins raw Rehmannia, Ophiopogon and Coptis. Lung dryness joins Glehnia and Ophiopogon. Write Tian Hua Fen; do not dispense Gua Lou; do not place it with Fu Zi or Chuan Wu.

How do you choose and store Tian Hua Fen?

Choose large white or pale-yellow pieces, a starchy fracture with radiating wood, faint odor and a slightly bitter taste. Gray-black withered, moldy, moth-eaten and poorly starchy lots are discarded. Keep closed, cool and dry against moths. Buy pharmacopoeial Tian Hua Fen; do not replace clearing heat, generating fluid and expelling pus with Gua Lou or bee pollen by equal weight.

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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.