Mugwort Leaf | Traditional Herbal Medicines

🌿 Mugwort Leaf – A Warming Herb for Cold Patterns, Menstrual Support and Bleeding Control in TCM

Mugwort Leaf, known as Ai Ye in TCM, is the dried leaf of the mugwort plant. It is commonly used when the body shows cold signs, such as cold abdominal pain, menstrual discomfort relieved by warmth, irregular menstruation, prolonged bleeding due to deficiency-cold, or a need to warm the meridians. Because this herb is warming, it is not suitable for people with fever, strong internal heat, acute inflammation, or bleeding caused by heat.

Mugwort Leaf – a warming herb for cold patterns in TCM

Quick information

• Scientific name / Pinyin / Chinese: Herba Artemisiae vulgaris / Ai Ye / 艾叶
• Nature, taste and meridian: Pungent, Bitter and Warm – associated with the Liver, Spleen and Kidney meridians
• Main uses: To warm the body, warm the meridians, help stop bleeding from deficiency-cold, ease cold-type pain, support menstrual regulation and may be used externally for itching related to cold-dampness
• Suggested dosage: 3–9 g per day, usually decocted under guidance; external use as appropriate

1. Origin and description

Mugwort Leaf is the dried leaf of the mugwort plant, commonly referred to in materia medica as Ai Ye. It belongs to the Asteraceae family. The plant is perennial, with green upper leaves, grayish-white undersides and a distinctive aromatic scent.

The leaves are harvested at good growth, cleaned and shade-dried or gently dried with low heat. Good dried Ai Ye is gray-green, wrinkled and aromatic, with a slightly sharp aroma and a mildly Bitter, Pungent taste.

In TCM processing, charred Mugwort Leaf is usually preferred when the formula focuses on bleeding control, while raw or lightly dry-fried Ai Ye is more often used to warm the meridians, disperse cold and ease cold-type pain.

2. Related names of Mugwort Leaf

This herb is also known in Vietnamese as Lá ngải cứu, Ngải nhung, Cứu thảo or Ai diệp. Its common TCM name is Ai Ye, and its Chinese name is 艾叶.

Scientific name: Folium Artemisiae Argyi. Pinyin name: Ai Ye. Chinese name: 艾叶.

For medicinal use, choose clean herbs with clear origin, proper drying, good storage and no mold, dust or unusual odor. At Thanh Tam Herbs, quality selection and correct identification are important parts of safe herbal use.

3. Nature, taste and meridian

According to TCM, Mugwort Leaf has a Pungent and Bitter taste with a Warm nature. Its Pungent quality helps disperse Cold and move qi and blood, while the Bitter quality supports regulation. Its Warm nature is valued for cold abdominal pain, lower abdominal pain and menstrual discomfort improved by warmth.

Ai Ye enters the Liver, Spleen and Kidney meridians, which relate to blood, menstruation, digestion, reproductive health and the lower body.

4. Benefits of Mugwort Leaf in TCM

Mugwort Leaf is a warming herb, generally more suitable for “cold” patterns than “hot” patterns. Key traditional actions include:

• Warms the meridians and helps stop bleeding: Often used for bleeding patterns related to deficiency-cold, especially when the body feels cold and weak.
• Disperses cold and eases pain: Traditionally used for cold abdominal pain, lower abdominal pain and discomfort that feels better with warmth.
• Supports menstrual regulation: Used in selected formulas for irregular menstruation or period pain due to cold patterns.
• Supports pregnancy in classical formulas: May appear in traditional formulas for restless fetus patterns when a qualified Herb doctor confirms suitability.
• External use: May be used for steaming, washing, soaking or warm compresses for itching, cold pain or cold-dampness on the skin.

This herb is not a universal remedy for menstrual cramps. If pain is severe, recurrent or long-lasting, medical evaluation is important.

5. How to use Ai Ye and suggested dosage

Mugwort Leaf is usually decocted with other herbs. A common reference dosage is 3–9 g of dried herb per day, depending on the formula and condition.

• Decoction: Used in herbal formulas, often combined with warming, blood-nourishing or bleeding-control herbs.
• Charred preparation: Used when the formula needs a stronger focus on stopping bleeding, but processing must be done correctly.
• External use: May be used for herbal steam, foot soak, warm compress or external wash under proper guidance.
• Moxa preparation: Mugwort can be processed into moxa wool for moxibustion, which should be performed by a trained practitioner.

Do not use high doses, long-term daily use or replace prescribed treatment without professional advice.

6. Indications and contraindications

Indications

In TCM, Mugwort Leaf is commonly used for cold abdominal pain, menstrual cramps due to cold, cold-type irregular menstruation, prolonged bleeding related to deficiency-cold, restless fetus patterns based on TCM differentiation, coldness in the abdomen, weak digestion due to cold and external itching associated with cold-dampness.

Contraindications

People with yin deficiency and internal heat, constipation, dry mouth, high fever, acute infection, bleeding from blood heat or allergy to Asteraceae plants should use caution. Pregnant women should not use Ai Ye for pregnancy support on their own. Children, people using anticoagulants or hormone-related medicines, and people with chronic conditions should consult a Herb doctor first.

7. Reference herbal combinations with Ngải diệp

• Cold-type menstrual cramps: Mugwort Leaf + Cyperus rhizome + Dong Quai + Chuan Xiong.
• Bleeding due to deficiency-cold: Charred Ai Ye + Donkey-hide gelatin + charred Sanguisorba root + Licorice root.
• Cold abdomen with dull pain: Ai Ye + Dried ginger + Cinnamon twig.
• Restless fetus pattern due to deficiency-cold: Ai Ye + Donkey-hide gelatin + Dipsacus Root + Taxillus twig.
• Warming foot soak: Mugwort + fresh ginger + coarse salt, used externally when there is no open wound.

These combinations are for reference only and should be adjusted by constitution, cause, pattern diagnosis and professional guidance from a Herb doctor.

8. Frequently asked questions

• Is Mugwort Leaf the same as the mugwort used in daily cooking?
  They come from the same plant group, but medicinal Ai Ye must be harvested, processed, stored and dosed correctly.
• Is Mugwort Leaf warming or cooling?
  It is Warm. It is not suitable for people who already show strong heat signs.
• Can this herb be used for menstrual cramps?
  It may be suitable when the pain is due to Cold and feels better with warmth. Severe or persistent pain should be checked by a healthcare professional.
• Should Mugwort Leaf be taken every day?
  Long-term daily use is not recommended without guidance, because the wrong pattern may cause heat signs or worsen symptoms.