Herb Fruit (果 guǒ / 果实 guǒ shí)

Lu Lu Tong

Sweetgum fruit · 路路通

Liquidambar formosana Hance · Fructus Liquidambaris

Also known as: Formosan Sweetgum Fruit

Lu Lu Tong (Sweetgum fruit) plant

Images shown are for educational purposes only

Lu Lu Tong, whose name literally means "all roads open," is a spiky ball-shaped fruit from the sweetgum tree used in Chinese medicine to promote circulation and relieve blockages throughout the body. It is commonly used for joint and muscle pain, swelling, menstrual irregularities, insufficient breast milk, and itchy skin conditions like hives and eczema.

Category Blood-invigorating and stasis-dispelling herbs (活血化瘀药) Wind-Damp dispelling herbs (祛风湿药)
Therapeutic focus Joint and Muscle Health Menstrual Health Skin Health Fluid Retention and Edema Breastfeeding and Lactation Support

TCM Properties

Temperature

Neutral

Taste

Bitter (苦 kǔ)

Channels entered

Liver, Kidneys

Parts used

Fruit (果 guǒ / 果实 guǒ shí)

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What This Herb Does

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

Therapeutic focus

In practical terms, Lu Lu Tong is primarily used to support these areas of health:

Joint and Muscle Health Menstrual Health Skin Health Fluid Retention and Edema Breastfeeding and Lactation Support

TCM Actions

In TCM terminology, these are the specific therapeutic actions that Lu Lu Tong performs to restore balance in the body:

Dispels Wind-Dampness and Unblocks the Collaterals Promotes Urination Regulates menstruation and promotes lactation Drains Dampness Invigorates Blood and Moves Qi Relieves Itching

How these actions work

'Dispels Wind and unblocks the channels and collaterals' means this herb helps clear Wind-Dampness from the joints and muscles while opening up the body's network of pathways. A classical teaching states that Lu Lu Tong "greatly opens all twelve channel pathways" (大能通行十二经穴). This is why it is a go-to herb for joint pain, numbness, muscle stiffness, and difficulty bending or straightening the limbs, especially when caused by Wind-Dampness lodging in the body.

'Promotes urination' means it helps the body expel excess water through the urinary tract. Because of its bitter, downward-draining nature, it can address swelling and puffiness (edema) and difficulty urinating. It is often combined with other water-draining herbs like Fu Ling (Poria) and Ze Xie (Alisma) for this purpose.

'Regulates menstruation and promotes lactation' refers to its ability to open blocked channels in the Liver system. The Liver governs the smooth flow of Qi and Blood, and when that flow is obstructed, menstrual periods may become scanty, irregular, or stop altogether, and breast milk may not flow properly after childbirth. Lu Lu Tong helps restore this flow, which is why it is commonly paired with herbs like Wang Bu Liu Xing and Dang Gui for menstrual and lactation problems.

'Moves Qi and invigorates Blood' describes its capacity to push stagnant Qi and Blood through the body. This makes it useful for pain in the epigastric area, abdominal bloating, and traumatic injuries with bruising and swelling.

'Relieves itching' reflects its Wind-dispelling action applied to the skin. Wind is a major cause of itching in TCM, and Lu Lu Tong's ability to drive out Wind makes it helpful for hives, eczema, and other itchy skin conditions.

Patterns Addressed

In TCM, symptoms cluster into recognizable patterns of disharmony. Lu Lu Tong is used to help correct these specific patterns.

Why Lu Lu Tong addresses this pattern

Lu Lu Tong is bitter and neutral, entering the Liver and Kidney channels, which govern the sinews, bones, and joints. Its primary action of dispelling Wind and unblocking the collaterals directly addresses the Wind-Dampness that lodges in the joints and muscles in this pattern. Its broad channel affinity (classically said to "open all twelve channels") makes it especially useful when pain and stiffness affect multiple joints or shift from place to place. It both expels the pathogenic factors (Wind-Dampness) and restores flow through the affected channels.

A practitioner would look for one or more of these signs

Moving Pain

Aching pain in the joints, especially lower back and extremities

Numbness In Limbs

Numbness and tingling in the limbs

Muscle Stiffness

Muscular contracture and difficulty bending or straightening limbs

Swollen Joints

Swelling of joints aggravated by damp weather

Commonly Used For

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

Arises from: Wind-Damp

TCM Interpretation

In TCM, chronic joint pain is most commonly understood as a Painful Obstruction (Bi) syndrome, where pathogenic Wind, Cold, and Dampness invade and lodge in the joints and channels, blocking the normal flow of Qi and Blood. When Qi and Blood cannot circulate freely through the affected areas, pain, stiffness, numbness, and swelling result. The Liver governs the sinews and the Kidneys govern the bones, so herbs that enter these channels are especially relevant for joint complaints. Over time, the obstruction can lead to fixed deformity if not addressed.

Why Lu Lu Tong Helps

Lu Lu Tong directly addresses joint pain through its Wind-dispelling and channel-unblocking actions. As a bitter, neutral herb entering the Liver and Kidney channels, it targets the sinews and bones where joint pain originates. Its classical reputation for "opening all twelve channels" makes it especially useful when pain affects multiple joints or moves around the body. It both expels the Wind-Dampness causing the blockage and restores Qi and Blood circulation through the affected joints, addressing both the cause and the symptoms of joint pain.

Also commonly used for

Rheumatoid Arthritis

Joint inflammation and stiffness due to Wind-Damp obstruction

Low Breast Milk Supply

Insufficient lactation due to blocked channels

Edema

Swelling from impaired water metabolism

Eczema

Itchy, weeping skin lesions from Wind-Dampness

Allergic Sinusitis

Nasal allergies with congestion

Painful Menstruation

Menstrual cramps from Blood stasis

Trauma

Bruising, swelling, and pain from physical trauma

Herb Properties

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

Temperature

Neutral

Taste

Bitter (苦 kǔ)

Channels Entered

Liver Kidneys

Parts Used

Fruit (果 guǒ / 果实 guǒ shí)

Dosage & Preparation

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

Standard dosage

5-10g

Maximum dosage

Up to 12g in decoction for adults, under practitioner supervision. Some sources cite up to 15g for short-term use in cases of severe dampness or oedema.

Dosage notes

Use lower doses (5-6g) for mild Qi stagnation, epigastric discomfort, or skin itching. Use moderate doses (6-9g) for Wind-Damp painful obstruction, menstrual irregularity, or promoting lactation. Higher doses (9-12g) may be used for marked oedema or severe channel obstruction. When used externally, the herb can be burned to ash and applied topically, or the smoke can be inhaled for upper body complaints. The processed form (chao Lu Lu Tong, lightly dry-fried until slightly scorched) is sometimes preferred to reduce any mild irritant properties and enhance the aromatic quality.

Preparation

No special decoction handling is required. Lu Lu Tong is decocted normally with the other herbs. However, it is sometimes lightly dry-fried (chao) before use to bring out its aromatic quality and mildly enhance its warming, channel-opening effect. When used externally, it may be calcined to ash (duan cun xing) and ground to powder for topical application, or burned directly so the smoke can be inhaled.

Processing Methods

In TCM, the same herb can be prepared in different ways to change its effects — here's how processing alters what Lu Lu Tong does

Processing method

The raw herb is placed in a dry wok and stir-fried over gentle heat until it turns slightly scorched yellow and releases a fragrant aroma. After cooling, the sharp spines on the surface are rubbed off and removed.

How it changes properties

The thermal nature and channel entry remain the same (bitter, neutral, Liver and Kidney). Stir-frying makes the hard, woody fruit easier to crush and improves the extraction of active compounds during decoction. The removal of the sharp spines also makes the herb safer and easier to handle during preparation.

When to use this form

This is the most commonly used form in clinical practice. The stir-fried form is preferred whenever Lu Lu Tong is used in decoctions, as the raw fruit is very hard and its active compounds are difficult to extract without processing.

Common Herb Pairs

These ingredients are traditionally combined with Lu Lu Tong for enhanced therapeutic effect

Wang Bu Liu Xing
Wang Bu Liu Xing 1:1 (Lu Lu Tong 10g : Wang Bu Liu Xing 10g)

Both herbs are powerful channel openers with a strong affinity for promoting lactation and regulating menstruation. Lu Lu Tong opens the twelve channels broadly and moves Qi, while Wang Bu Liu Xing specifically invigorates Blood and unblocks the breast and uterine network vessels. Together they powerfully promote lactation and restore menstrual flow.

When to use: Breast milk insufficiency or blockage with breast distension and pain, or amenorrhea and scanty menstruation from Qi and Blood stagnation.

Shen Jin Cao
Shen Jin Cao 1:1 (Lu Lu Tong 10g : Shen Jin Cao 10g)

Lu Lu Tong dispels Wind-Dampness and unblocks the collaterals, while Shen Jin Cao (Lycopodium) is particularly strong at relaxing the sinews and relieving spasms and contracture. Together they provide both channel-opening and sinew-relaxing actions, covering both the circulatory obstruction and the muscular tightness in painful obstruction patterns.

When to use: Wind-Damp Bi syndrome with joint pain, numbness, and muscular contracture or spasm, especially in the limbs.

Yi Mu Cao
Yi Mu Cao 1:2 (Lu Lu Tong 10g : Yi Mu Cao 15-20g)

Lu Lu Tong enters the Liver channel and moves Qi to open blocked pathways, while Yi Mu Cao (Leonurus/Motherwort) is a premier Blood-invigorating herb for gynecological conditions. Together they address both the Qi stagnation and Blood stasis sides of menstrual problems, providing a comprehensive approach to restoring menstrual flow.

When to use: Painful periods, scanty menstruation, amenorrhea, or postpartum abdominal pain from Blood stasis.

Fu Ling
Fu Ling 1:1.5 (Lu Lu Tong 10g : Fu Ling 15g)

Lu Lu Tong opens the body's channels and waterways with its bitter, descending nature, while Fu Ling (Poria) gently drains Dampness through the urinary tract with its bland, seeping quality. Together they address water retention from different angles, one by unblocking pathways and the other by promoting gradual drainage.

When to use: Edema and difficult urination, especially when fluid accumulation is accompanied by a sense of heaviness or fullness.

Comparable Ingredients

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

Wang Bu Liu Xing
Lu Lu Tong vs Wang Bu Liu Xing

Both herbs promote lactation and regulate menstruation by unblocking channels. However, Wang Bu Liu Xing is more specifically a Blood-invigorating herb that targets the breast and uterine vessels, making it stronger for lactation insufficiency and amenorrhea. Lu Lu Tong has a broader range of action, also dispelling Wind-Dampness for joint pain and promoting urination for edema, areas where Wang Bu Liu Xing has little effect.

Qin Jiao
Lu Lu Tong vs Qin Jiao

Both herbs treat Wind-Damp Bi syndrome with joint pain. Qin Jiao (Gentiana macrophylla) is bitter, acrid, and slightly cold, making it better suited for Bi syndrome with Heat signs such as red, swollen, hot joints. Lu Lu Tong is neutral and has the additional benefits of promoting urination, regulating menstruation, and relieving itching, giving it a wider clinical application beyond musculoskeletal pain.

Mu Tong
Lu Lu Tong vs Mu Tong

Both herbs promote urination and unblock channels. Mu Tong (Akebia stem) is bitter, cold, and drains Heart Fire downward through the Small Intestine, making it better for urinary tract inflammation with burning and painful urination. Lu Lu Tong is neutral and better for general edema and water retention, and has additional Wind-dispelling and Blood-moving actions that Mu Tong lacks.

Common Substitutes & Adulterants

Related species and common adulterations to be aware of when sourcing Lu Lu Tong

Lu Lu Tong (the fruit of Liquidambar formosana) can be confused with the fruit of Firmiana simplex (梧桐果, wutong fruit), which has a somewhat similar spherical shape. A simple chemical test can distinguish them: when treated with zinc powder and hydrochloric acid and heated, a Lu Lu Tong extract turns orange-red, while wutong fruit shows no reaction. The two also differ visually: Lu Lu Tong has a characteristic honeycomb pattern and sharp thorn-like projections, while wutong fruit lacks these features. Additionally, the resin of the same tree (known as Feng Xiang Zhi / Bai Jiao Xiang, 枫香脂/白胶香) is a completely different medicinal substance with different actions and should not be confused with the fruit.

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

Toxicity Classification

Classical Chinese pharmacopoeia toxicity rating for Lu Lu Tong

Non-toxic

Lu Lu Tong is classified as non-toxic in classical and modern pharmacopoeia sources. Multiple classical references (Xian Dai Shi Yong Zhong Yao, Zhejiang Min Jian Cao Yao, Quan Zhou Ben Cao) explicitly note it as having no toxicity. At standard dosages, no significant toxic reactions have been reported. With prolonged high-dose use, some sources note possible mild side effects such as dizziness or nausea, which resolve upon stopping the herb. Its active triterpene compounds (betulonic acid, oleanolic acid) and volatile oils are present at levels that do not pose toxicity concerns at normal therapeutic doses.

Contraindications

Situations where Lu Lu Tong should not be used or requires extra caution

Avoid

Pregnancy: Lu Lu Tong has Blood-invigorating and channel-opening properties that may stimulate uterine activity and risk miscarriage. Classical sources explicitly state that pregnant women should avoid this herb.

Avoid

Heavy menstrual bleeding (menorrhagia): The herb's Blood-moving and channel-opening actions can worsen excessive menstrual flow.

Caution

Yin deficiency with no Blood stasis: As a drying, unblocking herb, Lu Lu Tong may further deplete fluids and Yin in patients who lack substantial stasis or dampness patterns.

Caution

Active hemorrhage or bleeding disorders: The herb promotes Blood circulation and may aggravate bleeding conditions.

Special Populations

Important considerations for pregnancy, breastfeeding, and pediatric use

Pregnancy

Contraindicated during pregnancy. Lu Lu Tong actively promotes Blood circulation and opens channels throughout the body, which can stimulate uterine contractions and potentially cause miscarriage. Classical sources consistently state that pregnant women should not use this herb (孕妇忌服). This applies to all forms of administration including decoction, powder, and external fumigation.

Breastfeeding

Lu Lu Tong is traditionally used to promote lactation and unblock breast milk flow (tong ru). Some commercial sources advise against use during nursing as a general precaution. However, in TCM clinical practice, the herb is specifically indicated for insufficient or blocked breast milk due to Qi and Blood stagnation, often combined with Wang Bu Liu Xing and Tong Cao. When used for this purpose under professional guidance at standard dosages, it is considered appropriate for breastfeeding women. Self-medication during breastfeeding is not recommended.

Children

No specific paediatric dosage guidelines are established in classical texts. In general, dosage for children should be reduced proportionally based on age and body weight, typically to one-third to one-half of the adult dose. Due to its Blood-moving properties, it should be used cautiously in children and only under professional guidance. It is not commonly prescribed as a primary herb for paediatric conditions.

Drug Interactions

If you are taking pharmaceutical medications, be aware of these potential interactions with Lu Lu Tong

No well-documented specific drug interactions have been established through clinical studies. However, based on its pharmacological profile, the following theoretical interactions should be considered:

  • Anticoagulant and antiplatelet medications (e.g. warfarin, aspirin, clopidogrel): Lu Lu Tong promotes Blood circulation and could theoretically enhance the effects of blood-thinning drugs, increasing bleeding risk.
  • Diuretics: The herb has water-promoting (diuretic) properties and could potentially add to the effects of pharmaceutical diuretics, requiring monitoring of fluid and electrolyte balance.

Patients on any regular medications should consult a qualified practitioner before using Lu Lu Tong.

Dietary Advice

Foods and dietary considerations when taking Lu Lu Tong

When taking Lu Lu Tong to treat Wind-Damp painful obstruction or oedema, avoid cold, raw, and greasy foods that may generate further dampness and impede the herb's channel-opening effects. When used to promote lactation, a warm, nourishing diet supportive of Qi and Blood is recommended. Avoid excessively spicy or drying foods if the herb is being used in someone with underlying Yin deficiency.

Botanical Description

Physical characteristics and morphology of the Lu Lu Tong source plant

Liquidambar formosana Hance (Chinese sweetgum) is a large deciduous tree in the Hamamelidaceae (witch-hazel) family, reaching 20 to 40 metres in height. The bark is grey-brown and peels off in square-shaped patches. The leaves are alternate, broadly heart-shaped, and typically three-lobed (occasionally five-lobed on young growth), 6 to 12 cm long and 8 to 15 cm wide, with finely serrated margins. The tree is monoecious: male flowers are pale yellow-green, arranged in catkin-like clusters at the branch tips, while female flowers cluster into dense spherical heads that are purplish-red in colour. Flowering occurs in March to April.

The medicinal part, Lu Lu Tong, is the dried mature compound fruit (infructescence). It is a spiky, spherical aggregate of many small capsules, 2 to 3 cm in diameter, greyish-brown to dark brown, covered with numerous beak-shaped or thorn-like projections. When the capsules open at their tips, they reveal a distinctive honeycomb-like pattern of small holes, which is how the herb got its folk name "nine-holed seed" (jiu kong zi). The tree grows naturally in moist, fertile soils of low mountains and secondary forests across southern China.

Sourcing & Harvesting

Where Lu Lu Tong is sourced, when it's harvested or collected, and how to assess quality

Harvesting season

Winter, after the fruit has fully matured (typically October onwards). Fallen or harvested fruit clusters are collected, the stalks and impurities removed, then sun-dried.

Primary growing regions

Mainly produced in Jiangsu, Zhejiang, Jiangxi, Fujian, and Guangdong provinces in southern China. Additional production regions include Hubei, Hunan, Anhui, Henan, Guizhou, and Shaanxi. The tree is widely distributed across all provinces south of the Qinling Mountains and Huai River line. Fujian, Zhejiang, and Jiangsu are considered among the best traditional producing regions.

Quality indicators

Good quality Lu Lu Tong should be round and spherical (2-3 cm diameter), relatively large, and yellow-brown in colour. The surface should show clearly visible thorn-like projections and a prominent honeycomb pattern of small holes when the capsule tips have opened. It should feel light in weight but firm and hard, not easily broken apart. The aroma should be faint but distinctive, and the taste bland. Avoid specimens that are very dark or blackened, overly small, have excessive remaining fruit stalks, or show signs of mould or insect damage. The best commercial grade is described classically as 'large and yellow' (以色黄、个大者为佳).

Classical Texts

Key passages from the classical Chinese medical texts that describe Lu Lu Tong and its therapeutic uses

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

Original Chinese: 枫果去外刺皮，内圆如蜂窝，即路路通。其性大能通行十二经穴，故《救生苦海》治水肿胀用之，以其能搜逐伏水也。

Translation: When the outer thorny shell of the sweetgum fruit is removed, the interior is round like a honeycomb; this is Lu Lu Tong. Its nature is powerfully able to open and move through all twelve channel acupoints. Therefore the text Jiu Sheng Ku Hai uses it to treat oedema and distension, because it is able to search out and expel hidden water.

Ben Cao Gang Mu Shi Yi (《本草纲目拾遗》, another passage)

Original Chinese: 辟瘴却瘟，明目，除湿，舒筋络拘挛，周身痹痛，手脚及腰痛，焚之嗅其烟气皆愈。

Translation: It dispels miasma and wards off epidemic disease, brightens the eyes, eliminates dampness, relaxes sinew-channel contractures, and treats painful obstruction throughout the whole body, including the hands, feet, and lower back. Burning it and inhaling the smoke can cure all of these.

Ling Nan Cai Yao Lu (《岭南采药录》, Record of Collected Medicines from Lingnan)

Original Chinese: 治风湿流注疼痛及痈疽肿毒。

Translation: Treats Wind-Damp streaming pain and deep-seated abscesses with swelling and toxicity.

Xian Dai Shi Yong Zhong Yao (《现代实用中药》, Modern Practical Chinese Materia Medica)

Original Chinese: 烧灰外用于皮肤湿癣、痔漏等，有收敛、消炎、消毒作用。

Translation: Burned to ash and applied externally for damp skin tinea, haemorrhoidal fistulae, and similar conditions; it has astringent, anti-inflammatory, and antiseptic actions.

Historical Context

The history and evolution of Lu Lu Tong's use in Chinese medicine over the centuries

The name Lu Lu Tong (路路通, literally "all roads open" or "passageways all unblocked") vividly describes the herb's therapeutic character: its ability to open channels throughout the body. The name also references the fruit's physical appearance, since when the small capsules open and release their seeds, the numerous holes give the impression of many interconnected passageways. Other folk names like "jiu kong zi" (九空子, "nine-holed seed") similarly refer to this honeycomb structure.

The sweetgum tree (Liquidambar formosana) was first described botanically in Chinese literature as early as the Jin Dynasty in the Nan Fang Cao Mu Zhuang (《南方草木状》, Account of Plants from the South), which noted the tree's resemblance to poplar, its fragrant resin, and its fruiting pattern. The Tang Ben Cao (《唐本草》) further documented the tree as growing widely in mountains with distinctive triangular leaves. However, the medicinal use of the fruit as Lu Lu Tong was not formally recorded until the Qing Dynasty, when Zhao Xuemin's Ben Cao Gang Mu Shi Yi (《本草纲目拾遗》) described its remarkable ability to "open and traverse all twelve channel acupoints." Among the Miao ethnic group of southern China, the sweetgum tree holds deep cultural and spiritual significance. It is associated with the ancestor deity Chi You, and the Miao have a traditional saying: "No sweetgum, no village; no village without a sweetgum" (无枫不成寨，无寨不有枫).

The late Qing-era physician Ding Ganren (丁甘仁) was noted for pairing Lu Lu Tong with Yan Hu Suo, Jin Ling Zi, and Chai Hu to treat Liver-channel pain in the lower abdomen. In modern times, Lu Lu Tong has attracted research interest because the Liquidambar tree is a significant natural source of shikimic acid, a precursor for the synthesis of the antiviral drug oseltamivir (Tamiflu).

Modern Research

3 published studies investigating the pharmacological effects or clinical outcomes of Lu Lu Tong

1

Oleanane Triterpenoids with Inhibitory Activity against NFAT Transcription Factor from Liquidambar formosana (In vitro study, 2004)

Kim NY, et al. Planta Medica, 2004, 70(5), 466-469.

Researchers isolated four oleanane-type triterpenoids from the ethyl acetate extract of Lu Lu Tong fruits. Two of these compounds showed strong inhibitory activity against the NFAT transcription factor, which plays a key role in immune and inflammatory responses. This suggests a potential mechanism behind the herb's traditional anti-inflammatory uses.

PubMed
2

Identification of Anti-Breast Cancer Targets of Triterpenoids in Liquidambaris Fructus (Network pharmacology study, 2020)

Qian P, Mu XT, Su B, Gao L, Zhang DF. BMC Complementary Medicine and Therapies, 2020, 20(1), 369.

Using network pharmacology and molecular docking, this study investigated the potential anti-breast cancer targets of triterpenoids found in Lu Lu Tong fruit. The findings provided molecular-level evidence supporting the herb's potential anticancer activity and helped explain some of its traditional clinical applications.

PubMed
3

Sweetgum: An Ancient Source of Beneficial Compounds with Modern Benefits (Review, 2015)

Lingbeck JM, et al. International Journal of Chemistry, 2015, 7(2), 1-10.

This review summarised the medicinal properties of Liquidambar species, including evidence that extracts of L. formosana fruits can inhibit the neuraminidase activity of the H1N1 influenza virus. The article also highlighted the antioxidant, antimicrobial, and hepatoprotective activities of various sweetgum-derived compounds including shikimic acid and betulonic acid.

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.