Herb Leaf (叶 yè)

Ai Ye

Mugwort leaf · 艾叶

Artemisia argyi Lévl. et Vant. · Folium Artemisiae Argyi

Also known as: Chinese mugwort, Silvery wormwood, Artemisia leaf,

Ai Ye (Mugwort leaf) plant

Images shown are for educational purposes only

Mugwort leaf is one of the most widely used warming herbs in Chinese medicine, best known as the raw material for moxibustion. Taken internally, it warms the womb, stops bleeding, and eases cold-related abdominal pain, making it especially valued in women's health for painful or irregular periods, heavy menstrual bleeding, and fertility support. Used externally as a wash, it helps relieve itchy skin conditions like eczema.

Category Hemostatic herbs (止血药) Warming herbs that stop bleeding (温经止血药)
Therapeutic focus Menstrual Health Fertility Cold-Type Pain Relief Eczema and Dermatitis Relief

TCM Properties

Temperature

Warm

Taste

Acrid / Pungent (辛 xīn), Bitter (苦 kǔ)

Channels entered

Liver, Spleen, Kidneys

Parts used

Leaf (叶 yè)

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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 Ai Ye does in the body, explained in both everyday and TCM terms

Therapeutic focus

In practical terms, Ai Ye is primarily used to support these areas of health:

Menstrual Health Fertility Cold-Type Pain Relief Eczema and Dermatitis Relief

TCM Actions

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

Warms the Channels and Stops Bleeding Dispels Cold and Alleviates Pain Warms the womb and regulates menstruation Calms the Fetus Dries Dampness and Stops Itching

How these actions work

'Warms the channels and stops bleeding' means Ai Ye uses its warm nature to strengthen the body's ability to hold Blood within the vessels. In TCM, Cold can cause the body to lose its grip on Blood, leading to various types of bleeding. Ai Ye is particularly suited for bleeding that occurs alongside signs of internal Cold, such as heavy menstrual bleeding with pale, watery blood, or nosebleeds and vomiting of blood in people with a cold constitution. The charred form (Ai Ye Tan) is especially strong for this action.

'Disperses Cold and stops pain' means Ai Ye's acrid, warm nature helps drive out Cold that has settled in the body's interior, especially in the lower abdomen. Cold constricts and blocks the smooth flow of Qi and Blood, causing cramping pain. This action is relevant for lower abdominal pain that worsens with cold and improves with warmth, cold-type diarrhea, and cramping in the limbs.

'Warms the womb and regulates menstruation' makes Ai Ye one of the most important herbs in women's health. It directly enters the Liver and Kidney channels, which govern the uterus. When Cold lodges in the womb, it can cause painful periods, irregular cycles, heavy bleeding, and difficulty conceiving. Ai Ye warms the uterus, restores normal Blood circulation, and creates conditions favourable for conception.

'Calms the fetus' means Ai Ye helps stabilise a pregnancy that is threatened by Cold in the lower abdomen, addressing symptoms like vaginal bleeding or restlessness during pregnancy. It is a key herb in the classical formula Jiao Ai Tang used for this purpose.

'Dispels Dampness and stops itching' applies primarily to external use. When Ai Ye is decocted and used as a wash, its aromatic, bitter, and drying properties help clear Dampness from the skin. This is used for eczema, skin rashes, itchy skin, and vaginal itching.

Patterns Addressed

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

Why Ai Ye addresses this pattern

Cold in the Uterus (Gong Han) is a pattern where pathogenic Cold lodges in the womb, constricting Blood flow and impairing reproductive function. Ai Ye is one of the primary herbs for this pattern because its warm nature and affinity for the Liver and Kidney channels allow it to directly warm the uterus, dispel Cold, and restore normal Blood circulation in the lower abdomen. Its acrid taste helps move stagnation caused by Cold constriction, while its bitter taste provides a mild drying effect against any co-existing Dampness. This makes it suited for the characteristic cramping menstrual pain, delayed or scanty periods, and infertility associated with a cold womb.

A practitioner would look for one or more of these signs

Amenorrhea

Menstrual pain that improves with warmth

Infertility

Difficulty conceiving due to a cold uterine environment

Irregular Menstruation

Delayed periods with dark, clotted menstrual blood

Cold Limbs

Cold lower abdomen and cold extremities during menses

Commonly Used For

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

Arises from: Cold in the Uterus

TCM Interpretation

TCM understands painful periods primarily through the principle that 'where there is no free flow, there is pain' (不通则痛). In cold-type dysmenorrhea, pathogenic Cold constricts the channels and Blood vessels of the uterus, causing Blood to stagnate. The Liver channel, which passes through the lower abdomen and governs the smooth flow of Qi, is particularly affected. The Kidney channel, which provides the fundamental warmth (Yang) to the reproductive system, may also be deficient. This combination of Cold constriction and insufficient warming leads to cramping pain that characteristically worsens with exposure to cold and improves with the application of warmth, such as a hot water bottle.

Why Ai Ye Helps

Ai Ye is one of the most direct herbal answers to cold-type dysmenorrhea. Its warm nature and channel entry into the Liver and Kidneys allow it to reach the uterus and dispel the Cold that is constricting Blood flow. Its acrid taste actively mobilises Qi and Blood, helping to break through the stagnation that causes pain. This dual action of warming and moving makes it more targeted than simple pain-relieving herbs. In classical practice, it is often combined with Xiang Fu (Cyperus) to add Qi-moving and Liver-soothing effects, a pairing used in the well-known formula Ai Fu Nuan Gong Wan. Modern research on moxibustion, which uses Ai Ye as its primary material, has shown it can significantly reduce menstrual pain intensity.

Also commonly used for

Irregular Menstruation

Cold-related menstrual irregularity

Threatened Miscarriage

With vaginal bleeding and cold-type constitution

Bleeding

Functional uterine bleeding from deficiency Cold

Eczema

External wash for itching and weeping skin lesions

Nosebleeds

In cold-deficient constitutions

Diarrhea

Cold-Damp type chronic diarrhea

Thin Vaginal Discharge

Profuse clear/white discharge from Cold-Damp

Abdominal Pain

Cold-type epigastric or lower abdominal pain

Vaginitis

External wash for vaginal itching

Herb Properties

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

Temperature

Warm

Taste

Acrid / Pungent (辛 xīn), Bitter (苦 kǔ)

Channels Entered

Liver Spleen Kidneys

Parts Used

Leaf (叶 yè)

Dosage & Preparation

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

Standard dosage

3–9g

Maximum dosage

Up to 15g in acute Cold-type uterine bleeding, under practitioner supervision. Do not exceed this range for internal decoction use due to volatile oil toxicity risk with higher doses.

Dosage notes

Use lower doses (3–6g) for warming the channels and regulating menstruation. Use moderate to higher doses (6–9g) for stopping bleeding due to Cold, especially in the charred form (Ai Ye Tan). For external use as a wash (eczema, skin itching), larger amounts (15–30g) can be decocted for topical application without toxicity concerns. The raw herb (生艾叶) is more aromatic and dispersing, better for Cold pain and skin conditions. Vinegar-processed Ai Ye (醋艾叶) is milder and less drying, preferred for deficiency-Cold patterns. Charred Ai Ye (艾叶炭) has the strongest hemostatic action and is the form of choice for bleeding disorders.

Preparation

For internal decoction, Ai Ye should not be decocted for too long, as prolonged boiling drives off the volatile oils that are therapeutically important. Add it during the last 5–10 minutes of decoction (后下, hou xia / add near end) when using the raw herb for its warming and dispersing properties. When using the charred form (Ai Ye Tan) for hemostasis, standard decoction time is acceptable since the volatile oil content has already been reduced by charring.

Processing Methods

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

Processing method

Clean Ai Ye is mixed evenly with rice vinegar, left to absorb until thoroughly moistened, then stir-fried over gentle heat until dry. The standard ratio is 15 kg vinegar per 100 kg of Ai Ye.

How it changes properties

Vinegar processing moderates the herb's drying tendency, making it warm without being overly drying. The vinegar also enhances the herb's ability to enter the Liver channel, strengthening its pain-relieving and Cold-dispersing actions. The aromatic quality becomes milder, replaced by a slight vinegar scent.

When to use this form

Preferred for patterns of deficiency Cold in the lower abdomen where the primary goal is pain relief rather than hemostasis. Commonly chosen for cold-type dysmenorrhea, infertility due to a cold womb, and lower abdominal cramping in people who tend toward dryness and cannot tolerate the raw herb's stronger dispersing nature.

Common Herb Pairs

These ingredients are traditionally combined with Ai Ye for enhanced therapeutic effect

E Jiao
E Jiao Ai Ye 9g : E Jiao 9g (1:1, with E Jiao dissolved separately into the strained decoction)

Ai Ye warms the channels and stops bleeding; E Jiao (Ass-Hide Gelite) nourishes Yin, supplements Blood, and stops bleeding. Together, they address both the Cold (Ai Ye warming) and the deficiency (E Jiao nourishing), creating a synergy for stopping uterine bleeding that neither herb achieves as effectively alone. This is the core pair in the classical Jiao Ai Tang formula.

When to use: Deficiency-Cold type uterine bleeding: heavy menstrual periods, flooding and spotting (崩漏), threatened miscarriage with vaginal bleeding, or postpartum hemorrhage due to Cold in the uterus.

Xiang Fu
Xiang Fu Ai Ye 9g : Xiang Fu 9g (1:1)

Ai Ye warms the lower abdomen and disperses Cold; Xiang Fu (Cyperus) moves Liver Qi, unblocks stagnation, and regulates menstruation. Together they address both Cold stagnation and Qi stagnation in the lower abdomen simultaneously, relieving menstrual pain more effectively than either alone. This is the core pair of Ai Fu Nuan Gong Wan (Mugwort-Cyperus Warm the Uterus Pill).

When to use: Menstrual pain (dysmenorrhea), irregular periods, or infertility caused by Cold in the uterus with Qi stagnation. Key signs: cold lower abdomen, pain relieved by warmth, dark menstrual blood with clots.

Gan Jiang
Gan Jiang Ai Ye 9g : Gan Jiang 3–6g (approximately 2:1 to 3:1)

Ai Ye warms the channels and uterus; Gan Jiang (Dried Ginger) powerfully warms the Middle Burner and Spleen Yang. Together, they create a strong interior-warming combination that addresses Cold at both the Spleen/digestive level and the lower body/uterine level, enhancing each other's Cold-dispelling effects.

When to use: Cold-type diarrhea or dysentery with abdominal pain, or deficiency-Cold uterine bleeding when Spleen Yang is also deficient (pale complexion, loose stools, cold limbs alongside menstrual problems).

Dang Gui
Dang Gui Ai Ye 6–9g : Dang Gui 9g (approximately 1:1)

Ai Ye warms the channels and stops bleeding; Dang Gui (Chinese Angelica Root) nourishes and invigorates Blood. Together they warm and nourish simultaneously, ensuring that stopping bleeding does not come at the cost of Blood stasis, and that nourishing Blood is supported by adequate warmth in the channels.

When to use: Blood Deficiency with Cold, presenting as scanty or delayed menstruation, dull abdominal pain, pale complexion, or threatened miscarriage in women with underlying Blood Deficiency and Cold constitution.

Key Formulas

These well-known formulas feature Ai Ye in a prominent role

Ai Fu Nuan Gong Wan 艾附暖宮丸 King

From Yang Shiying's Ren Zhai Zhi Zhi Fang Fu Yi (Song Dynasty), this is the definitive formula for uterine cold (gong han). Ai Ye is the primary warming herb alongside Xiang Fu (Cyperus), warming the uterus and dispersing cold to restore menstrual regularity. It treats a pattern of cold uterus causing irregular menstruation, painful periods with cold lower abdomen, clear vaginal discharge, and infertility. This formula showcases Ai Ye's signature role in gynecology as a uterus-warming herb.

Comparable Ingredients

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

Gan Jiang
Ai Ye vs Gan Jiang

Both Ai Ye and Pao Jiang (blast-fried ginger) warm the interior and stop bleeding due to Cold. The key difference: Ai Ye enters the Liver and uterus specifically, making it the preferred choice for gynecological Cold-type bleeding (heavy periods, threatened miscarriage). Pao Jiang focuses more on the Spleen and Stomach, making it better suited for gastrointestinal bleeding (bloody stool, vomiting blood) from Spleen Yang Deficiency. In uterine bleeding, Ai Ye is first choice; in digestive tract bleeding from Cold, Pao Jiang is often preferred.

Xiao Hui Xiang
Ai Ye vs Xiao Hui Xiang

Both herbs are warm, enter the Liver channel, and treat Cold-type lower abdominal pain. Xiao Hui Xiang (Fennel Seed) primarily moves Qi and is strongest for hernial pain and Cold-stagnation in the Liver channel causing testicular or inguinal pain. Ai Ye primarily warms the Blood and channels and is strongest for gynecological Cold patterns (menstrual pain, uterine bleeding, infertility from Cold). When the pain is more Qi-stagnation focused, Xiao Hui Xiang is chosen; when the problem is Cold Blood in the uterus, Ai Ye is preferred.

Common Substitutes & Adulterants

Related species and common adulterations to be aware of when sourcing Ai Ye

The most common substitute is Ye Ai (野艾, wild mugwort, Artemisia lavandulifolia or A. verlotorum), which grows widely across China and has similar appearance but generally lower volatile oil content and weaker therapeutic effect. In southern China, A. verlotorum is sometimes used interchangeably with true A. argyi. Ai Pian (艾片), the crystalline product from Blumea balsamifera (a different plant in the same family), is sometimes confused with Ai Ye products. These are entirely different substances with different uses. To identify authentic high-quality Ai Ye: the underside of genuine A. argyi leaves has very dense, thick grey-white tomentum, and the aroma is distinctly sweet-herbaceous. Wild mugwort varieties tend to have thinner tomentum and a sharper, less pleasant smell.

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

Toxicity Classification

Classical Chinese pharmacopoeia toxicity rating for Ai Ye

Slightly toxic

The volatile oil of Ai Ye is both the primary active component and the source of potential toxicity. It contains thujone, cineole, camphor, and other terpenoids. In excessive internal doses, the volatile oil can irritate the gastrointestinal mucosa, causing nausea and vomiting. More seriously, it can cause toxic hepatitis with jaundice and central nervous system disturbance (initial excitation leading to convulsions, followed by depression). These effects are dose-dependent and primarily a concern with concentrated essential oil preparations or markedly excessive decoction doses, not with standard clinical dosage. Proper processing and dosage make the herb safe: using aged mugwort (陈艾, stored 1–3 years) reduces volatile oil content and harshness. Charring the leaves (艾叶炭) further diminishes the pungent, dispersing properties while strengthening hemostatic action. At standard decoction doses of 3–9g, Ai Ye has a long history of safe clinical use.

Contraindications

Situations where Ai Ye should not be used or requires extra caution

Caution

Yin Deficiency with Blood Heat (阴虚血热): Ai Ye is warm and pungent. People with Yin Deficiency generating internal Heat, or with Blood Heat patterns, should avoid it as it can worsen Heat symptoms and further deplete Yin fluids. Classical texts state: 'Blood Heat conditions are prohibited' (血热为病者禁用).

Caution

Pre-existing Blood Deficiency with Heat signs: Those with chronic Blood loss who have developed secondary Heat signs (dry mouth, restlessness, red tongue with little coating) should not take Ai Ye, as its warm, drying nature can aggravate these symptoms.

Avoid

Excessive or prolonged internal use: The volatile oil in Ai Ye is both therapeutically active and potentially toxic. Prolonged or high-dose internal use can irritate the gastrointestinal mucosa, cause toxic hepatitis with jaundice, or overstimulate then depress the central nervous system, potentially causing convulsions.

Avoid

Hypersensitivity to Artemisia species: Individuals with known allergy to mugwort or other Artemisia plants should avoid Ai Ye. Mugwort pollen allergy is common in some regions and may cross-react with the herb itself.

Special Populations

Important considerations for pregnancy, breastfeeding, and pediatric use

Pregnancy

Ai Ye is traditionally considered safe during pregnancy at appropriate doses and is in fact one of the classical herbs for stabilizing pregnancy (安胎). The formula Jiao Ai Tang from the Jin Gui Yao Lue specifically uses Ai Ye combined with E Jiao to treat threatened miscarriage with vaginal bleeding due to Cold in the uterus. However, Ai Ye should only be used under practitioner guidance during pregnancy. Its warming, Blood-moving properties mean that excessive doses could theoretically overstimulate uterine circulation. It is indicated specifically for Cold-type threatened miscarriage and should not be used if the pregnancy complication involves Heat signs. The volatile oil component has central nervous system effects at high doses, which is an additional reason to keep within standard dosage range.

Breastfeeding

Ai Ye is generally considered compatible with breastfeeding at standard decoction doses (3–9g). It has a long tradition of postpartum use in Chinese medicine, including for postpartum abdominal pain from Cold and postpartum uterine bleeding. The volatile oil components could theoretically transfer into breast milk in small amounts, but no adverse effects on nursing infants have been documented at normal doses. External use (foot soaks, moxibustion) during breastfeeding is considered safe. Avoid prolonged or high-dose internal use, as the warming, drying properties could potentially reduce breast milk production in some individuals by consuming Yin fluids.

Children

Ai Ye can be used in children but at reduced doses proportional to age and body weight (typically one-third to one-half of the adult dose for children over 3 years). External use is more common in pediatrics: Ai Ye foot soaks or baths for Cold-type abdominal pain, mild moxibustion for digestive weakness. Internal use should be limited to short courses under practitioner guidance. Avoid use in infants under 1 year due to the volatile oil content and potential sensitivity of immature liver function.

Drug Interactions

If you are taking pharmaceutical medications, be aware of these potential interactions with Ai Ye

No well-documented pharmaceutical drug interactions have been established through clinical studies specific to Artemisia argyi. However, based on the known pharmacological properties of its active compounds, the following theoretical interactions warrant caution:

  • Anticoagulant and antiplatelet medications (e.g. warfarin, heparin, aspirin): Ai Ye has hemostatic (blood-stopping) properties. Concurrent use could theoretically interfere with anticoagulant therapy by opposing the drug's intended effect. Conversely, some Artemisia species contain coumarins that might potentiate anticoagulants. Monitor coagulation parameters if used together.
  • Sedative and CNS-depressant drugs (e.g. benzodiazepines, barbiturates): The volatile oil, particularly thujone and camphor components, has central nervous system effects. Concurrent use with sedatives may have unpredictable additive or antagonistic effects.
  • Hepatotoxic medications: Given that the volatile oil can cause liver damage at high doses, caution is advised when combining with other potentially hepatotoxic drugs (e.g. acetaminophen at high doses, certain statins).

Dietary Advice

Foods and dietary considerations when taking Ai Ye

When taking Ai Ye internally for Cold-type conditions, avoid cold and raw foods (salads, ice cream, chilled drinks, raw fruit) as these counteract the herb's warming effect. Favor warm, cooked foods and warming spices (ginger, cinnamon). Avoid excessively greasy or rich foods that could impede digestion and the herb's ability to dispel Dampness. Traditionally, Ai Ye is also consumed as a food: young spring leaves are used to make green rice cakes (青团, qing tuan) during the Qingming Festival in southern China, and Ai Ye tea is prepared by steeping dried leaves.

Botanical Description

Physical characteristics and morphology of the Ai Ye source plant

Artemisia argyi Lévl. et Vant. is a strongly aromatic perennial herb belonging to the Asteraceae (daisy) family. The plant typically grows 50–120 cm tall, with erect stems that are brown or grayish-yellow and lightly branched. The leaves are the medicinal part: they are ovate-elliptic in outline, deeply pinnately lobed with irregularly toothed margins. The upper leaf surface is grey-green with sparse soft hairs, while the underside is densely covered with grey-white woolly tomentum (fine hairs), giving the plant its distinctive silvery-backed appearance. The flowers are small, pale yellow, and arranged in panicles, blooming from July to October.

The plant is native to East Asia and grows widely across China, Japan, and Korea in fields, roadsides, forest margins, and wastelands. It prefers warm, humid climates but tolerates drought and partial shade, thriving best in deep, fertile, humus-rich loam soils. It spreads readily via underground rhizomes, making it easy to cultivate.

Sourcing & Harvesting

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

Harvesting season

Late spring to early summer (typically around May, before the flowers open), when the leaves are most lush and aromatic. Traditional custom specifies harvesting around the third day of the third lunar month or the fifth day of the fifth lunar month (Dragon Boat Festival).

Primary growing regions

The most prized Ai Ye comes from Qichun County (蕲春), Hubei Province, known as 'Qi Ai' (蕲艾). Li Shizhen wrote in the Ben Cao Gang Mu that since the Chenghua era of the Ming Dynasty, Qichun mugwort has been considered the finest, saying it was 'used to fill materia medica prescriptions, valued by all under heaven.' Modern analysis confirms that Qichun Ai Ye has significantly higher volatile oil, total flavonoid, and tannin content than mugwort from other regions. Historically, mugwort from Tangyin in Henan (called 'Bei Ai' or Northern Mugwort) and from Siming in Zhejiang ('Hai Ai' or Sea Mugwort) were also highly regarded during the Song Dynasty. Today, Ai Ye is commercially produced across Shandong, Anhui, Hubei, Henan, and Hunan provinces, with Hubei Qichun remaining the recognized dao di (terroir) source.

Quality indicators

Good quality Ai Ye leaves are large, intact (not excessively crumbled), and grey-green on the upper surface with abundant dense grey-white woolly hairs (tomentum) on the underside. The texture should be soft and pliable, not brittle. The aroma should be distinctly fragrant and characteristic, not musty or faint. The taste is slightly bitter and pungent. The best grade has thick tomentum, strong aroma, and minimal stems or impurities. Aged Ai Ye (陈艾, stored 1–3 years) is preferred for moxibustion and internal use because storage reduces harsh volatile oils while preserving therapeutic properties. Avoid leaves that are dark, musty-smelling, or show signs of mold or insect damage.

Classical Texts

Key passages from the classical Chinese medical texts that describe Ai Ye and its therapeutic uses

Ming Yi Bie Lu (名医别录) — Tao Hongjing, approximately 500 CE

Original: 艾叶，味苦，微温，无毒。主灸百病，可作煎，止下痢，吐血，下部匿疮，妇人漏血，利阴气，生肌肉，辟风寒，使人有子。

Translation: Ai Ye is bitter in taste, slightly warm, and non-toxic. It is the primary material for moxibustion to treat all diseases. Made into a decoction, it stops dysentery and vomiting of blood, heals sores of the lower body, stops abnormal uterine bleeding in women, benefits Yin Qi, promotes the growth of flesh, wards off wind and cold, and helps women conceive.

Ben Cao Gang Mu (本草纲目) — Li Shizhen, 1578 CE

Original: 服之则走三阴，而逐一切寒湿，转肃杀之气为融和；灸之则透诸经而治百种病邪，起沉疴之人为康泰，其功亦大矣。

Translation: Taken internally, it travels through the three Yin channels and expels all Cold-Damp, transforming harsh, killing Qi into gentle warmth. Used as moxibustion, it penetrates all the channels and treats a hundred kinds of disease-evil, raising those with deep, lingering illness back to health. Its merit is truly great.

Ben Cao Zheng (本草正) — Zhang Jiebin

Original: 艾叶，能通十二经，而尤为肝脾肾之药，善于温中、逐冷、除湿，行血中之气，气中之滞，凡妇人血气寒滞者，最宜用之。

Translation: Ai Ye can reach all twelve channels but is especially a medicine for the Liver, Spleen, and Kidney. It excels at warming the Middle, expelling Cold, removing Dampness, moving Qi within the Blood and resolving stagnation within the Qi. For all women with Cold stagnation of Blood and Qi, it is most appropriate.

Historical Context

The history and evolution of Ai Ye's use in Chinese medicine over the centuries

Ai Ye is one of the oldest and most culturally significant herbs in Chinese civilization. References to mugwort appear in the Shi Jing (Book of Songs, 11th–6th century BCE), and Mencius famously wrote 'for a seven-year illness, seek three-year-old mugwort' (七年之病，求三年之艾), confirming that by the Warring States period it was already an established medicine. The Zhuangzi also mentions 'the people of Yue fumigating with mugwort.'

Ai Ye was not listed in the Shen Nong Ben Cao Jing (possibly because it was confused with the related plant Bai Hao/white artemisia at that time). Its first formal pharmacological entry appeared in the Ming Yi Bie Lu (ca. 500 CE) by Tao Hongjing. The herb's reputation grew steadily through subsequent dynasties. Li Shizhen's father, Li Yanwen, was so impressed by mugwort that he wrote an entire monograph called the Qi Ai Zhuan (蕲艾传, 'Biography of Qichun Mugwort'), praising it as 'grown on sunny hills, harvested at Dragon Boat Festival, treating illness through moxibustion, its contribution is no small thing.' This text is now lost, but Li Shizhen carried forward his father's work in the Ben Cao Gang Mu, recording 52 single-herb and experiential formulas using Ai Ye, more than any other materia medica text.

Culturally, mugwort is inseparable from the Dragon Boat Festival (Duan Wu Jie). The custom of hanging mugwort above doorways on the fifth day of the fifth lunar month originated from the belief that its strong aroma could ward off pestilence and evil influences. The Chinese character for mugwort (艾) is also a homophone for 'love' (爱, ài), adding a layer of cultural affection. Its many classical aliases include 'Ice Platform' (冰台, from the practice of using ice lenses to focus sunlight onto mugwort tinder), 'Medicine Herb' (医草), and 'Moxibustion Herb' (灸草).

Modern Research

4 published studies investigating the pharmacological effects or clinical outcomes of Ai Ye

1

Comprehensive Review: Botany, Phytochemistry, Pharmacology, and Clinical Application of Artemisia argyi Folium (2024)

Liu Y et al., Journal of Ethnopharmacology, 2024

This review identified 136 compounds from Ai Ye, including 23 newly discovered terpenoids and 2 new flavonoids. The pharmacological effects were summarized as primarily anti-inflammatory, anti-tumor, antioxidant, and antibacterial. Clinical applications span gynecology, respiratory, immune, digestive, and nervous system conditions. The authors called for more rigorous quality standards and pharmacokinetic studies.

PubMed
2

Immunosuppressive Activity of Artemisia argyi Extract and Isolated Compounds (In Vitro Study, 2020)

Gründemann C et al., Frontiers in Pharmacology, 2020, 11, 402

Screening a library of 435 traditional Chinese medicine plant extracts, researchers found that an ethyl acetate extract of A. argyi potently suppressed human T cell proliferation in an IL-2-dependent manner without cytotoxicity. The immunomodulatory effect involved specific modulation of transcription factor activation and calcium signaling, suggesting potential for autoimmune disease research.

Link
3

Antimicrobial Effect and Mechanism of Artemisia argyi Essential Oil Against Bacteria and Fungus (In Vitro Study, 2024)

Ruan J et al., BMC Complementary Medicine and Therapies, 2024, 24, 87

The essential oil of A. argyi demonstrated broad-spectrum antimicrobial activity, effectively inhibiting four Gram-positive bacteria (S. aureus, B. subtilis, L. monocytogenes, S. pneumoniae) and two Gram-negative bacteria (E. coli, P. aeruginosa). Notably, the oil also inhibited Candida albicans at IC50 of approximately 215 μg/mL. The mechanism involved disruption of bacterial cell membrane permeability.

Link
4

Pharmacological and Bioactive Properties of Artemisia argyi Essential Oil: A Review (2025)

Li Y et al., Frontiers in Pharmacology, 2025, 16, 1664658

This systematic review surveyed the pharmacological activity of A. argyi essential oil (AAEO), covering anti-inflammatory, anticancer, antioxidant, antimicrobial, and insecticidal effects. The review noted that most evidence comes from cell and animal studies, with very few human clinical trials available. The authors identified chemical variability by growing region and low bioavailability as key challenges for clinical translation.

Link

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.