Herb Rhizome (根茎 gēn jīng)

Jin Qiao Mai

Wild buckwheat rhizome · 金荞麦

Fagopyrum dibotrys (D.Don) Hara · Rhizoma Fagopyri Dibotryis

Also known as: Ye Qiao Mai (野荞麦)

Images shown are for educational purposes only

Jin Qiao Mai (wild buckwheat rhizome) is a cooling herb best known for treating lung infections, particularly lung abscess with foul-smelling pus or bloody sputum. It clears Heat and toxins from the Lungs, helps discharge pus, and soothes sore throats. It also has a secondary benefit of supporting digestion in cases of poor appetite and bloating.

TCM Properties

Temperature

Cool

Taste

Acrid / Pungent (辛 xīn), Astringent (涩 sè)

Channels entered

Lungs

Parts used

Rhizome (根茎 gēn jīng)

Educational content Consult qualified TCM practitioners for diagnosis and treatment

What This Herb Does

Every herb has a specific set of actions — here's what Jin Qiao Mai does in the body, explained in both everyday and TCM terms

Therapeutic focus

In practical terms, Jin Qiao Mai is primarily used to support these areas of health:

How these actions work

'Clears Heat and resolves toxins' means Jin Qiao Mai cools down inflammatory and infectious conditions in the body, particularly in the Lungs. Its cool nature and slightly pungent taste allow it to both clear internal Heat and push toxic pathogens outward. This is why it is a go-to herb for conditions like lung abscess (fei yong), sore throat, and skin infections with redness and pus.

'Expels pus and dispels Blood stasis' refers to this herb's notable ability to help the body discharge accumulated pus from deep infections and break up stagnant blood. This dual action makes it especially valuable in suppurative (pus-forming) lung conditions where thick, foul-smelling phlegm or bloody pus is being coughed up. It addresses both the infection and the tissue damage simultaneously.

'Clears the Lungs and transforms Phlegm' means Jin Qiao Mai helps the Lungs do their job of keeping airways clear. When Heat congests the Lungs, mucus thickens and becomes difficult to expectorate. This herb cools the Lung tissue and thins the phlegm, making coughing more productive and easing breathing.

'Disperses swelling and benefits the throat' describes its ability to reduce swollen, inflamed tissue, particularly in the throat. The pungent taste gives it a dispersing quality that helps break up accumulations such as swollen lymph nodes (scrofula) and throat abscesses.

'Strengthens the Spleen and promotes digestion' is a secondary action. Although primarily a Heat-clearing herb, Jin Qiao Mai also supports the digestive system. It can be used for poor appetite, abdominal bloating, and childhood nutritional deficiency (gan ji), often combined with other digestive-supporting herbs like Fu Ling (Poria) and Mai Ya (barley sprout).

Patterns Addressed

In TCM, symptoms cluster into recognizable patterns of disharmony. Jin Qiao Mai is used to help correct these specific patterns.

Why Jin Qiao Mai addresses this pattern

Jin Qiao Mai's cool nature and pungent, astringent tastes directly address Heat-Toxin lodged in the Lungs. When Heat and toxic pathogenic factors accumulate in the Lung, they damage tissue and generate pus, producing the classic picture of lung abscess (fei yong). Jin Qiao Mai enters the Lung channel and clears this Heat-Toxin while simultaneously expelling pus and dispelling Blood stasis in the damaged tissue. Its ability to both resolve the infection and help drain the resulting abscess makes it especially suited for this pattern. The astringent quality also helps contain the damage, while the pungent quality disperses the congested toxins.

A practitioner would look for one or more of these signs

Cough Of Blood

Coughing up bloody, pus-like sputum with a foul smell

Productive Cough With Yellow Phlegm

Thick, yellow-green phlegm that is difficult to expectorate

Chest Pain

Chest pain aggravated by coughing

Fever

Fever with chills

Commonly Used For

These are conditions where Jin Qiao Mai is frequently used — but only when they arise from the specific patterns it addresses, not in all cases

Arises from: Lung Heat

TCM Interpretation

In TCM, lung abscess (fei yong) is understood as Heat-Toxin accumulating in the Lungs, stagnating blood and body fluids, and eventually causing tissue to break down and form pus. The process typically begins when external Wind-Heat or internal Heat congeals in the Lung tissue, obstructing the normal flow of Qi and Blood. As stagnation worsens, the tissue begins to rot and pus forms. The hallmark symptom is coughing up thick, foul-smelling, bloody or purulent sputum. The Lung's descending and dispersing functions are severely impaired, leading to chest pain, cough, and difficulty breathing.

Why Jin Qiao Mai Helps

Jin Qiao Mai is one of the most specific herbs for lung abscess because its actions address the condition at multiple levels. Its cool nature and Heat-clearing action counter the underlying Heat-Toxin that drives the infection. Its unique ability to expel pus (pai nong) directly helps the body discharge the accumulated purulent material. Its Blood-stasis-dispelling action (qu yu) addresses the stagnant blood that contributes to tissue breakdown. And its Phlegm-transforming capacity helps clear the thick, obstructed sputum. Classical sources note it can be used as a single herb for this condition, stewed in a sealed container with water, reflecting how central it is to treating lung abscess.

Also commonly used for

Chronic Bronchitis

Chronic and wheezing-type bronchitis with copious phlegm

Pneumonia

Suppurative pneumonia with thick sputum production

Bronchiectasis

Bronchiectasis with secondary purulent infection

Acute Tonsillitis

Peritonsillar abscess and acute tonsillitis with Heat-Toxin

Asthma

Bronchial asthma with phlegm-Heat obstruction

Dysentery

Bacterial dysentery with bloody, mucoid stools

Skin Abscess

Boils, furuncles, and pyogenic skin infections

Upper Respiratory Tract Infections

Upper respiratory infections with Heat-Toxin signs

Herb Properties

Every herb has an inherent temperature, taste, and affinity for specific channels — these properties determine how it interacts with the body

Temperature

Cool

Taste

Acrid / Pungent (辛 xīn), Astringent (涩 sè)

Channels Entered

Lungs

Parts Used

Rhizome (根茎 gēn jīng)

Dosage & Preparation

These are general dosage guidelines for Jin Qiao Mai — always follow your practitioner's recommendation, as dosages vary based on the formula and your individual condition

Standard dosage

15-45g

Maximum dosage

Up to 60g in severe acute pulmonary suppuration (lung abscess), under practitioner supervision. Some clinical reports have used large doses for short courses in acute infectious conditions.

Dosage notes

The standard range of 15-45g applies to decoction. A traditional and clinically important preparation method is to decoct the herb by steaming it in a sealed container over water (隔水炖服), sometimes with yellow rice wine (黄酒). This sealed steaming method is reported to yield significantly better clinical results for lung abscess than ordinary open boiling. For milder conditions like sore throat or upper respiratory infection, lower doses around 15-30g are typical. For severe lung abscess with pus, higher doses of 30-45g (or up to 60g short-term) may be used. When used externally for sores or snake bites, fresh rhizome is pounded and applied as a poultice, or ground with vinegar and applied topically.

Preparation

Traditionally, Jin Qiao Mai is best prepared by sealed steaming over water (隔水炖服) rather than open boiling. The rhizome pieces are placed in a container with water or yellow rice wine, then steamed in a sealed vessel. This method is considered to produce a more effective extraction, especially for treating lung abscess. If decocted in the standard way, it should be simmered for at least 30 minutes due to the rhizome's hard, dense texture.

Common Herb Pairs

These ingredients are traditionally combined with Jin Qiao Mai for enhanced therapeutic effect

Yu Xing Cao
Yu Xing Cao 1:1 (Jin Qiao Mai 15-30g : Yu Xing Cao 15-30g)

Both herbs enter the Lung channel and excel at clearing Heat-Toxin and expelling pus. Together they create a powerful synergy for treating lung abscess and suppurative lung infections. Yu Xing Cao (Houttuynia) is the foremost pus-expelling herb for the Lungs, while Jin Qiao Mai adds stronger Blood-stasis-dispelling action that addresses the tissue damage underlying abscess formation.

When to use: Lung abscess with foul-smelling purulent or bloody sputum, suppurative pneumonia, or severe bronchitis with signs of Heat-Toxin in the Lungs.

Jin Yin Hua
Jin Yin Hua 1:1 (Jin Qiao Mai 15-30g : Jin Yin Hua 15-30g)

Jin Yin Hua (Honeysuckle flower) is one of the broadest Heat-clearing and toxin-resolving herbs. When combined with Jin Qiao Mai, the pair provides comprehensive detoxification for the Lungs. Jin Yin Hua addresses systemic Heat-Toxin at the Qi level while Jin Qiao Mai targets the local suppurative process and Blood stasis in the lung tissue.

When to use: Early to mid-stage lung abscess, or severe upper respiratory infection with high fever, sore throat, and thick yellow sputum.

She Gan
She Gan 2:1 (Jin Qiao Mai 15-30g : She Gan 6-10g)

She Gan (Belamcanda rhizome) clears Heat, resolves toxins, and disperses Phlegm from the throat. Combined with Jin Qiao Mai, the pair targets throat conditions from two angles: She Gan opens the throat and transforms Phlegm blockage while Jin Qiao Mai provides stronger detoxification and pus-expelling action for deeper infections.

When to use: Acute tonsillitis, peritonsillar abscess, or severe sore throat with swelling and difficulty swallowing.

Pu Gong Ying
Pu Gong Ying 1:1 (Jin Qiao Mai 15-30g : Pu Gong Ying 15-30g)

Pu Gong Ying (Dandelion) is a broad-spectrum Heat-clearing and toxin-resolving herb with particular strength in treating external abscesses and boils. Together with Jin Qiao Mai, they create a potent anti-infective combination for skin and soft tissue infections. Jin Qiao Mai contributes its pus-expelling and Blood-stasis-dispelling actions to help resolve deep-seated abscesses.

When to use: Boils, carbuncles, skin abscesses, or other pyogenic skin infections. Can also be applied for snake bites when combined with Zi Hua Di Ding.

Comparable Ingredients

These ingredients have overlapping uses — here's how to tell them apart

Yu Xing Cao
Jin Qiao Mai vs Yu Xing Cao

Both herbs clear Heat-Toxin from the Lungs and expel pus, making them the two primary herbs for lung abscess. However, Yu Xing Cao (Houttuynia) is pungent and slightly cold, and additionally promotes urination and treats painful urinary dysfunction (hot lin syndrome) and damp-heat dysentery. Jin Qiao Mai has stronger action in dispersing masses and nodules (such as scrofula), dispelling Blood stasis, and also has a secondary Spleen-strengthening and digestion-promoting function that Yu Xing Cao lacks. Choose Yu Xing Cao when there are concurrent urinary symptoms; choose Jin Qiao Mai when there is more Blood stasis, hard nodules, or poor appetite alongside the lung infection.

Jie Geng
Jin Qiao Mai vs Jie Geng

Both herbs address lung conditions with phlegm and pus. However, Jie Geng (Platycodon root) is neutral to slightly warm and works primarily by opening and lifting Lung Qi to expel phlegm and guide other herbs upward to the Lungs. It does not itself strongly clear Heat-Toxin. Jin Qiao Mai is cool and directly clears Lung Heat-Toxin while expelling pus and dispelling Blood stasis. Choose Jie Geng as a guiding herb in formulas or when the primary issue is Phlegm obstruction without strong Heat signs; choose Jin Qiao Mai when there is active infection with Heat-Toxin and pus formation.

Bai Jiang Cao
Jin Qiao Mai vs Bai Jiang Cao

Both herbs clear Heat-Toxin and expel pus, but they target different body regions. Bai Jiang Cao (Patrinia) is best known for treating intestinal abscess (chang yong), while Jin Qiao Mai is best known for treating lung abscess (fei yong). When choosing between them, the location of the abscess guides the decision. For concurrent lung and intestinal suppurative conditions, they may be combined.

Common Substitutes & Adulterants

Related species and common adulterations to be aware of when sourcing Jin Qiao Mai

Jin Qiao Mai (the rhizome of Fagopyrum dibotrys) should not be confused with common buckwheat (Fagopyrum esculentum, Qiao Mai 荞麦) or Tartary buckwheat (Fagopyrum tataricum, Ku Qiao Mai 苦荞麦), which are food grains with different properties and uses. The rhizome is distinctive: hard, knotty, blackish-brown externally with a pale yellowish-white cross-section showing radial lines. Common buckwheat grains are triangular seeds, not rhizomes. Some regional markets may substitute other Polygonaceae rhizomes. Authentic Jin Qiao Mai can be verified by TLC (thin-layer chromatography) comparison with reference material as specified in the Chinese Pharmacopoeia.

Educational content — always consult a qualified healthcare provider or TCM practitioner before using any herb.

Toxicity Classification

Classical Chinese pharmacopoeia toxicity rating for Jin Qiao Mai

Non-toxic

Jin Qiao Mai is classified as non-toxic in the Chinese Pharmacopoeia and has been used clinically for many years with very few reported adverse effects. The main bioactive components are condensed tannins (proanthocyanidins), which at very high doses could potentially cause gastrointestinal irritation, nausea, or reduced appetite due to their astringent nature. At standard dosages (15-45g), these effects are not clinically significant. No specific toxic components requiring special processing have been identified.

Contraindications

Situations where Jin Qiao Mai should not be used or requires extra caution

Avoid

Pregnancy: Jin Qiao Mai has Blood-moving (activating blood circulation and dispelling stasis) properties, which may stimulate uterine contractions or disturb fetal stability. Classical and modern sources consistently list pregnancy as a contraindication.

Caution

Spleen and Stomach deficiency-cold patterns: Jin Qiao Mai is cool in nature with an astringent taste. In individuals with underlying cold or weakness in the digestive system, it may worsen symptoms such as loose stools, abdominal pain, or poor appetite.

Avoid

Known allergy to buckwheat (Fagopyrum) species: individuals with confirmed allergies to buckwheat or related Polygonaceae plants should avoid this herb to prevent allergic reactions.

Caution

Absence of Heat or Toxin patterns: because this herb is cool and clears Heat-Toxin, it is not appropriate for conditions caused by cold, deficiency, or absence of infection/inflammation, as prolonged use may injure the Spleen and Stomach Yang.

Special Populations

Important considerations for pregnancy, breastfeeding, and pediatric use

Pregnancy

Contraindicated during pregnancy. The Chinese Pharmacopoeia and standard TCM Materia Medica textbooks explicitly state that pregnant women should not use Jin Qiao Mai (孕妇禁用). The herb has blood-activating and stasis-dispelling properties that could potentially stimulate uterine activity and endanger the pregnancy. There is no established safe dose for pregnant women.

Breastfeeding

No specific safety data is available for Jin Qiao Mai during breastfeeding. Some commercial preparations advise against use while nursing. Because the herb's cool nature and blood-moving properties could theoretically affect the nursing infant through breast milk, it is generally recommended to avoid use during breastfeeding unless specifically prescribed by a qualified practitioner.

Children

No specific pediatric dosage guidelines are established in standard references. Jin Qiao Mai is not commonly used in paediatric prescriptions. If used for children under practitioner supervision, the dosage should be significantly reduced according to the child's age and body weight (commonly one-third to one-half of the adult dose for school-age children). Its cool, astringent nature may be poorly tolerated by children with weak digestion.

Drug Interactions

If you are taking pharmaceutical medications, be aware of these potential interactions with Jin Qiao Mai

No well-documented pharmaceutical drug interactions have been specifically established for Jin Qiao Mai in clinical literature. However, based on its pharmacological profile, the following theoretical considerations apply:

  • Anticoagulant and antiplatelet medications: Jin Qiao Mai has blood-activating properties. Concurrent use with warfarin, heparin, aspirin, or clopidogrel could theoretically increase bleeding risk, though this has not been confirmed in clinical studies.
  • Hypoglycaemic agents: Preclinical research shows that proanthocyanidins from F. dibotrys have alpha-glucosidase and alpha-amylase inhibitory activity. Concurrent use with diabetes medications (metformin, acarbose, sulfonylureas, insulin) could theoretically enhance blood sugar lowering effects and increase hypoglycaemia risk.
  • Iron supplements: The high tannin content of Jin Qiao Mai may reduce iron absorption if taken concurrently. It is advisable to separate administration by at least two hours.

Dietary Advice

Foods and dietary considerations when taking Jin Qiao Mai

While taking Jin Qiao Mai, avoid excessive consumption of cold, raw, and greasy foods, which may impair digestive function and reduce the herb's effectiveness. Because the herb is cool in nature and treats Heat-Toxin conditions, spicy and overly warming foods (such as chilli, deep-fried foods, lamb, and alcohol) should be moderated to avoid aggravating the underlying Heat condition being treated. Separate the herb from iron-rich supplements or iron-fortified foods by at least two hours, as the tannin content may interfere with iron absorption.

Botanical Description

Physical characteristics and morphology of the Jin Qiao Mai source plant

Fagopyrum dibotrys (D. Don) Hara is a perennial herbaceous plant in the Polygonaceae (buckwheat) family. It has a woody, blackish-brown rhizome that becomes knotty and thickened over time. The stems are erect, growing 50 to 100 cm (sometimes over 1 metre) tall, branching with longitudinal ridges, and are generally smooth though sometimes lightly hairy along one side. The leaves are triangular (similar in shape to common buckwheat leaves), 4 to 12 cm long and 3 to 11 cm wide, with a pointed tip and a nearly halberd-shaped base. Leaf surfaces may have small papillae or soft hairs, and the leaf stalks can reach 10 cm long. A membranous, brownish tubular sheath (ocrea) wraps each node of the stem.

Flowers appear in flat-topped clusters (corymbs) at the tips of stems or from leaf axils, blooming from July to September. Individual flowers are small and white, with five deeply-divided petal-like segments. The fruit is a broad, egg-shaped achene with three sharp ridges, blackish-brown and dull, maturing from August to October. The plant thrives in warm, moist habitats at elevations of 250 to 3,200 metres, commonly found along stream banks, mountain slopes, roadsides, and forest margins. It tolerates temperatures from about -10°C to 30°C and prefers fertile, well-drained sandy loam soils.

Sourcing & Harvesting

Where Jin Qiao Mai is sourced, when it's harvested or collected, and how to assess quality

Harvesting season

Winter (after the above-ground parts have withered), or autumn after the aerial portions die back. The Chinese Pharmacopoeia specifies winter harvesting.

Primary growing regions

Jin Qiao Mai is mainly produced in the provinces of Jiangsu, Zhejiang, Jiangxi, Hunan, Hubei, Shaanxi, Sichuan, Guizhou, Guangdong, and Guangxi in China. Jiangsu and Zhejiang have historically been considered the primary production regions, with products from these areas regarded as high quality. The genus Fagopyrum is especially concentrated in southwest China. It also grows in Nepal, India, and other parts of South and Southeast Asia. Note that wild populations have declined significantly due to over-harvesting, and since 1999, Jin Qiao Mai has been listed as a national second-class protected plant in China.

Quality indicators

Good quality Jin Qiao Mai rhizome pieces are large and solid, hard to break, with a firm texture. The outer surface should be dark brown (棕褐色) with visible horizontal ring-like nodes, longitudinal wrinkles, and dense dot-like lenticels. The cross-section should be pale yellowish-white to pale brownish-red with clearly visible radial lines radiating outward, and a slightly darker central pith area. The aroma is faint, and the taste should be slightly astringent (微涩). Pieces that are lightweight, hollow, overly dark, or soft and spongy are of inferior quality.

Classical Texts

Key passages from the classical Chinese medical texts that describe Jin Qiao Mai and its therapeutic uses

Xin Xiu Ben Cao (《新修本草》, Newly Revised Materia Medica, Tang Dynasty)

Original: 主赤白冷热诸痢,断血破血,带下赤白,生肌肉。

Translation: "Treats various types of dysentery (both red and white, cold and hot), stops bleeding and breaks up [stagnant] Blood, addresses vaginal discharge (both red and white), and promotes the regeneration of flesh."

Ben Cao Shi Yi (《本草拾遗》, Supplement to the Materia Medica, Tang Dynasty)

Original: 主痈疽恶疮毒肿,赤白游疹,虫、蚕、蛇、犬咬,并醋摩敷疮上,亦捣茎叶敷之;恐毒入腹,亦煮服之。

Translation: "Treats abscesses, malignant sores, toxic swellings, and migrating rashes. For bites from insects, silkworms, snakes, or dogs, grind [the root] with vinegar and apply to the wound, or pound the stems and leaves to apply topically. If there is concern the toxin has entered the abdomen, also decoct and take internally."

Ben Cao Gang Mu Shi Yi (《本草纲目拾遗》, Supplement to the Compendium of Materia Medica, Qing Dynasty)

Original (on treating throat obstruction): 金荞麦,用醋磨,漱喉,涎痰去而喉闭自开。

Translation: "For Jin Qiao Mai [treating throat wind and throat toxin]: grind with vinegar and gargle the throat. Once saliva and phlegm are expelled, the throat obstruction will open on its own."

Historical Context

The history and evolution of Jin Qiao Mai's use in Chinese medicine over the centuries

Jin Qiao Mai was first recorded under the name Chi Di Li (赤地利) in the Xin Xiu Ben Cao (《新修本草》), the Tang Dynasty official pharmacopoeia compiled around 659 CE. Its entry described a vine-like plant with red-black root bark and yellowish-red flesh, used for dysentery and bleeding conditions. The Ben Cao Shi Yi (《本草拾遗》, Tang Dynasty, 739 CE) by Chen Cang Qi provided further detail, noting its leaves resembled buckwheat and describing its use for abscesses and venomous bites.

The name "Jin Qiao Mai" (金荞麦, "golden buckwheat") derives from the plant's buckwheat-like leaves and the yellowish-red (golden) colour of the root's interior. It has accumulated many colourful folk names over the centuries. "Jin Suo Yin Kai" (金锁银开, "golden lock, silver key") refers to its reputed ability to "unlock" throat obstructions, as recorded by Wang Lian Shi in his Cai Yao Shu. "Zei Gu Tou" (贼骨头, "thief's bone") was a nickname among folk healers because bandits reportedly kept the herb for treating injuries from falls and fights. Names like "Qiao Mai San Qi" (荞麦三七) and "Qiao Dang Gui" (荞当归) reflect its blood-moving properties, likening it to San Qi and Dang Gui. In modern times, the herb gained prominence after clinical success treating lung abscesses (pulmonary suppuration) in the 1970s, which led to its inclusion in the Chinese Pharmacopoeia.

Modern Research

3 published studies investigating the pharmacological effects or clinical outcomes of Jin Qiao Mai

1

Systematic Review: Towards a Better Understanding of Fagopyrum dibotrys (2021)

Li K, Fan H, Yin P, et al. Chinese Medicine. 2021;16:59.

A comprehensive systematic review of the phytochemistry and pharmacology of F. dibotrys. The review found over 100 compounds isolated from the plant, primarily flavonoids and phenols, and confirmed anti-inflammatory, anti-cancer, antioxidant, antibacterial, and antidiabetic activities in preclinical studies. Flavonoids and phenolic compounds were identified as the main active ingredients.

PubMed
2

In Vitro Study: Antioxidant and Antidiabetic Activity of Proanthocyanidins from Fagopyrum dibotrys (2021)

Cui Y, Xie H, Wang J. Molecules. 2021;26(9):2417.

This study compared proanthocyanidins from seven Polygonaceae plants and found that F. dibotrys rhizome had the highest total proanthocyanidin content along with the strongest antioxidant and antidiabetic (alpha-glucosidase and alpha-amylase inhibitory) activities. The proanthocyanidins from F. dibotrys showed better antidiabetic activity than grape seed proanthocyanidins in laboratory assays.

PubMed
3

In Vitro Study: Neuraminidase Inhibitory Activity and Constituent Characterization of Fagopyrum dibotrys (2017)

Huang D, Jiang Y, Chen W, et al. Molecules. 2017;22(11):1998.

Researchers identified 32 compounds in F. dibotrys extracts and tested them for neuraminidase (NA) inhibitory activity, which is relevant to influenza treatment. The ethyl acetate extract showed the strongest NA inhibition. Key active compounds included rutin, hesperidin, procyanidin B2, and quercitrin, suggesting potential anti-influenza virus properties.

PubMed

Research on individual TCM herbs is growing but still limited by Western clinical trial standards. These studies provide emerging evidence and should be considered alongside practitioner expertise.