Fruits and seedsAstringentFructus Tritici Levis

Fu Xiao Mai (Light Wheat)

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

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Last reviewed Oct 13, 2026

Quick Facts

Latin NameFructus Tritici Levis
Chinese Name & Pinyin 浮小麥 · Fu Xiao Mai
Medicinal PartFruits and seeds
The herbFu Xiao Mai is the shriveled, light grain of wheat. Ordinary wheat and Jing Mi are not this specification.
Nature and channelsSweet, cool. Enters the Heart. Sweetness boosts qi. Coolness eliminates heat and stops sweat.
Pharmacopoeia lineBoosts qi. Eliminates heat. Stops sweating. Used for spontaneous sweat, night sweat, and steaming-bone consumptive heat.
Pattern cuesSpontaneous sweat. Night sweat. Steaming bone. Palpitations.
In this articleFu Xiao Mai versus wheat, Huang Qi, and Mu Li. Its place in Mu Li San. Why an exterior pattern should not be secured. Who should skip it.

What Is Fu Xiao Mai?

Fu Xiao Mai (浮小麦; Fú Xiǎo Mài; Latin: Tritici Levis Fructus; English: light wheat grain) is the shriveled, light grain of Triticum aestivum L. In Chinese medicine it is a sweat-stopping herb. It is sweet and cool, enters the Heart channel, and its core actions are to boost qi, eliminate heat, and stop sweating. The teaching point is spontaneous sweat and night sweat. It is not ordinary wheat. Wheat is sweet-cool and more clearly nourishes the Heart and eliminates vexation. The light grain more specifically stops sweat. It is not Jing Mi. In Mu Li San it sits with Huang Qi and Mu Li. That is a pairing for exterior deficiency or yin-deficiency sweating, not a single-herb sweat tea. Damp fullness is a poor match for large amounts. Night sweat and steaming bone need pattern diagnosis. Do not secure every sweat.

It is used most often for three patterns:

  • Spontaneous sweat — qi deficiency failing to secure
  • Night sweat — yin deficiency with heat
  • Steaming-bone consumptive heat — this belongs with a practitioner

The usual decoction dose is 15–30 g. Sweet and cool, it is not a daily “sweat wheat tea.” Securing when there is no sweat, or in damp-heat with no sweat, obstructs the middle.

When the exterior fails to secure, or yin deficiency has interior heat, spontaneous sweat and night sweat are common. Fu Xiao Mai is sweet-cool. It boosts, eliminates heat, and stops sweat, which is why it appears in Mu Li San. It secures more than it releases. Sweating in an exterior fever gets more trapped if more securing is added.

Fu Xiao Mai is not a catch-all sweat grain. In an exterior pattern, or when securing is used with no sweat, using it alone can trap the pathogen. Whether it belongs in Mu Li San should be decided by a licensed Chinese medicine practitioner after pattern diagnosis.

Fu Xiao Mai Blighted Wheat

Fu Xiao Mai: Materia Medica Profile

Identification & Quality Standard

Fructus Tritici Levis

Botanical Origin

The dried light, shriveled caryopsis of Triticum aestivum L. (Poaceae) that floats in water.

Production Regions

Collected wherever wheat is grown in China, especially Henan, Shandong and Hebei.

Quality Requirements

Superior medicinal material is uniformly light, yellowish-white, and free of heavy full grains.

Macroscopic Features

Shrunken oblong grains, light enough to float; externally yellowish-white; hollow or incompletely filled.

3 Sourcing and Quality Identification

Traditionally, the best quality comes from the major northern wheat-producing regions in China.

  • High Quality: Look for grains that are shriveled, very light, and float easily in water. They should be light yellow or brownish with a mild, natural wheat aroma and absolutely no signs of mold.
  • Raw vs. Processed: Raw grains feel slightly rough, while stir-baked ones are darker and a bit brittle.
  • Common Mix-ups: Do not confuse it with regular, plump wheat grains. Regular wheat will sink in water and does not possess the same medicinal properties.

Traditional Properties & Historical Lineage

Nature, Flavour & Channel Tropism

Sweet; CoolHeart

1. 2 Historical Records

This humble grain has a solid reputation in classic TCM texts:

  • Ben Cao Meng Quan specifically noted its ability to "stop weak sweating."
  • Ben Cao Gang Mu added that it can "boost Qi and clear heat," showing it doesn't just stop sweat but also addresses the underlying heat.
  • Zhong Hua Ben Cao modernizes these records, confirming its use for spontaneous daytime sweating and night sweats.

2. 3 Evolution of Understanding

Early herbalists focused almost entirely on its sweat-stopping powers. Over time, doctors realized its true strength lies in clearing the "empty heat" that often causes the sweating.

  • Important Caveat: Modern TCM practitioners emphasize that it is not a cure-all for all types of sweating. If someone is sweating profusely due to "excess heat" (like a severe fever) or "damp-heat," Fu Xiao Mai (Light Wheat) should not be used alone and requires careful pairing with other herbs.

Fu Xiao Mai Blighted Wheat

Core Efficacies & Traditional Applications

Traditional Functions

Augments qi, clears heat, and stops sweating. Apply to spontaneous sweating and night sweating from qi or yin deficiency.

1. 1 First Primary Action: Astringing Fluids and Stopping Sweat

The primary traditional use of Fu Xiao Mai (Light Wheat) is to "astringe" or hold in bodily fluids to stop excessive sweating.

  • Common Symptoms: It is ideal for spontaneous sweating (sweating with minimal exertion) and night sweats (sweating during sleep that stops upon waking), especially when accompanied by mild "empty heat" signs like warm palms/soles, restlessness, and dry mouth.
  • Common Pairings: For empty heat, it is often paired with cooling herbs like Zhi Mu (Anemarrhena Rhizome). For Qi deficiency, it pairs well with Qi-boosting herbs like Huang Qi (Astragalus Root) or Bai Zhu (Atractylodes Rhizome).
  • Caution: Do not use this herb alone if you are sweating heavily due to "excess heat" (like a high fever) or "damp-heat" (indicated by a thick tongue coating, bitter taste, or sticky stools), as it can trap the heat inside the body and worsen symptoms.

2. 2 Second Primary Action: Clearing Empty Heat

It is also highly effective at clearing "empty heat" from the Heart, Lung, and Stomach meridians.

  • Common Symptoms: It treats "bone-steaming" heat (a sensation of heat radiating from deep within the bones), restlessness, dry mouth and throat, and night sweats, typically seen in people who are chronically fatigued, weak, or recovering from a long illness.
  • Common Pairings: It is frequently combined with other heat-clearing herbs like Di Gu Pi (Wolfberry Bark) or Yin Chai Hu (Stellaria Root).
  • Caution: Avoid using it if your fever is caused by an external pathogen (like a cold or flu with a sore throat) or if you have a cold-deficient Spleen and Stomach (causing chills and diarrhea).

3. 3 Common Single Herb Pairing: The Herb Pair

A classic and powerful pairing is Fu Xiao Mai (Light Wheat) with Huang Qi (Astragalus Root).

  • Synergy: Fu Xiao Mai excels at clearing empty heat and stopping sweat, while Huang Qi is the ultimate herb for boosting Qi and strengthening the body's exterior defense.
  • Best For: This combo is perfect for people with Qi deficiency combined with empty heat—those who catch colds easily, sweat with mild activity, and have warm palms and soles. Always consult a practitioner for the correct dosage ratio.

Fu Xiao Mai Blighted Wheat

Modern Research

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

1. 1 Main Chemical Components and Pharmacological Directions

Modern lab analysis shows that Fu Xiao Mai (Light Wheat) contains proteins, carbohydrates, B vitamins, dietary fiber, and trace amounts of alkaloids and sterols.

  • Lab Observations: In animal models and cell cultures, water extracts of this herb have shown a mild tendency to regulate body temperature and reduce sweat gland secretion, which aligns with its traditional use for "empty heat."

2. 2 Limitations of Modern Research

While modern science provides some clues, we must view these lab results with caution:

  • Lab vs. Human Reality: Results from a petri dish or a mouse model do not perfectly translate to complex human bodies. Large-scale human clinical trials are still lacking.
  • Extracts vs. Whole Herbs: Lab studies often use highly concentrated extracts or isolated alkaloids. This is very different from drinking a traditional tea made from whole, dried grains.
  • Holistic Synergy: TCM relies on the combined effect of all compounds working together in the body. Isolating one single chemical doesn't fully explain how the whole herb functions traditionally.

Fu Xiao Mai Blighted Wheat

Comparing Similar Herbs

1. 2 Similarities with Comparable Herbs

Both Fu Xiao Mai (Light Wheat) and Nuo Dao Gen (Glutinous Rice Root) are used to stop excessive sweating (like spontaneous or night sweats) and are gentle enough to be used in daily teas or dietary therapy.

2. 3 Core Differences

  • Nature and Flavor: Fu Xiao Mai is slightly cool and sweet, focusing on clearing heat while astringing. Nuo Dao Gen is neutral and sweet, without a strong cooling or warming bias.
  • Therapeutic Focus: Fu Xiao Mai is better at clearing empty heat from the Heart, Lungs, and Stomach. Nuo Dao Gen is better at stabilizing the exterior and nourishing the Stomach to generate fluids.
  • Target Symptoms: Choose Fu Xiao Mai when sweating is accompanied by heat signs (night sweats, warm palms, dry mouth). Choose Nuo Dao Gen when sweating is linked to a weak digestive system (poor appetite, fatigue, loose stools).
  • Contraindications: Avoid Fu Xiao Mai if you have severe spleen/stomach cold. Avoid Nuo Dao Gen if you have heavy internal damp-heat.

3. 4 One-Sentence Summary

Fu Xiao Mai (Light Wheat) clears heat while stopping sweat (best for heat-related sweating), whereas Nuo Dao Gen (Glutinous Rice Root) stabilizes the exterior and benefits the stomach (best for weakness-related sweating).

Fu Xiao Mai Blighted Wheat

Classical Formulas Containing Fu Xiao Mai

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. 1 Home Tea or Dietary Application

  • Fu Xiao Mai and Hong Zao Tea:
    • Ingredients: 15g raw Fu Xiao Mai (Light Wheat), 3 pitted Hong Zao (Red Date).
    • Method: Wash the wheat, tear the dates, steep in boiling water for 10 minutes.
    • Best For: Mild spontaneous or night sweats with slight dry mouth or warm palms. Great for summer or daily regulation.
    • Caution: Avoid if you have a cold stomach or frequent diarrhea. Drink 2-3 times a week.
  • Fu Xiao Mai and Geng Mi Porridge:
    • Ingredients: 20g raw Fu Xiao Mai (Light Wheat), 50g Geng Mi (Japonica Rice), a little rock sugar.
    • Method: Wrap the wheat in a cheesecloth, boil in water for 20 minutes, remove the cloth. Add the washed rice to the herbal water and cook into a porridge.
    • Best For: Fatigue, poor appetite, and sweating after a long illness.

2. 2 Preparation Differences

  • Raw vs. Stir-baked: Stir-baked Fu Xiao Mai has a stronger astringent (sweat-stopping) effect but is weaker at clearing heat; it’s best for sweating without obvious heat signs. Raw Fu Xiao Mai is better for clearing empty heat.
  • Cooking Note: When boiling at home, you don't need special preparation. Just simmer it directly in water. Remember, dried medicinal herbs are highly concentrated and cannot be swapped 1:1 with fresh extracts or powders.

3. 3 Dosage and Usage Cycle

  • Dosage: Clinical doses range from 10-30g. For home dietary use, stick to a milder 10-15g.
  • Cycle: Use for short periods (1-2 weeks). Stop once symptoms improve. Do not use continuously long-term without professional advice.
Fu Xiao Mai Blighted Wheat

Contraindications & Safety Warnings

1. 1 Not Suitable For

  • Damp-Heat/Excess Heat: Avoid if you have a thick tongue coating, bitter taste, sticky stools, or are sweating profusely due to a high fever.
  • Cold Spleen/Stomach: Avoid if you frequently experience stomach aches, diarrhea, cold hands/feet, or poor appetite due to coldness.
  • Wheat Allergies: Strictly contraindicated for anyone with an allergy to wheat or grass-family plants.
  • Vulnerable Groups: Pregnant/nursing women, children, the elderly, and those with liver/kidney issues should only use this under medical supervision.

2. 2 Drug Interactions and Dietary Notes

  • Medication Interactions: Fu Xiao Mai may interact with blood thinners, blood pressure medications, diabetes drugs, or sedatives (potentially enhancing the sedative effect). Always consult your doctor or pharmacist if you are on chronic medication.
  • Dietary Pairings: Do not mix arbitrarily with other strong herbs or medications without professional guidance.

3. 3 Adverse Reactions and Risks

  • Digestive Upset: Because it is an astringent herb, taking too much can slow down digestion, leading to bloating, stomach discomfort, or diarrhea.
  • Emergency Warning: If you experience allergic reactions, severe discomfort, breathing difficulties, or rapid worsening of symptoms, stop using it immediately and seek medical help. Do not attempt to manage severe reactions at home.

Frequently Asked Questions About Fu Xiao Mai

What is Fu Xiao Mai? Are wheat, Mai Ya and Ma Huang Gen the same?
Fu Xiao Mai (浮小麦) is the dried light, shriveled fruit of Triticum aestivum. The standard name is Tritici Levis Fructus; it is listed in the ministerial crude-drug standard, not plump food wheat. Mai Ya is germinated barley: moves qi, disperses food and stops lactation. Ma Huang Gen is sweet-neutral: secures the exterior and stops sweating; it is the root of ephedra, not the herb. Write Fu Xiao Mai. Use caution when an exterior pathogen is not cleared.
What are the TCM properties and traditional uses of Fu Xiao Mai?
The ministerial standard records Fu Xiao Mai as sweet, salty and cool, entering the Heart channel, and acting to boost qi, stop sweating and eliminate heat. It is used for spontaneous sweating, night sweating, yin-vacuity fever and steaming-bone taxation heat. Sweet-salty, cool and astringing, it suits vacuity sweating and steaming bone—not an uncleared exterior pathogen, vexation without sweating, or collapse sweating.
Does Fu Xiao Mai need special processing? Can food wheat replace it?
After harvest, collect the light shriveled grains and sun-dry them. Slight dry-frying is preferred for stopping sweat. Plump wheat is a food; it cannot replace constraining sweat and eliminating heat by equal weight. Germinated barley disperses food and stops lactation—the opposite direction. Commercial blighted-wheat tea is not equal-weight pieces.
What is the usual dosage? Can it be drunk daily as a sweat-stopping tea?
The usual decoction dose is 15–30 g. It is not a four-season “blighted wheat sweat tea.” An uncleared exterior only closes further as it astringes. Spontaneous sweating and night sweating need a practitioner to name a short course; it does not replace thyroid and infection assessment.
What are the contraindications? Can it be used in pregnancy?
Unsuitable when an exterior pathogen is not cleared and sweating is present. Avoid in vexation without sweat and in collapse sweating. Pregnancy needs a practitioner’s assessment. Stop if absence of sweat with high fever appears. Profuse sweat with cold limbs and chest pain are emergencies.
Can Fu Xiao Mai boost qi, stop sweating and eliminate heat?
It can help qi-vacuity spontaneous sweating and yin-vacuity night sweating. Qi-vacuity spontaneous sweating joins astragalus, calcined oyster shell and ephedra root in Mu Li San, often decocted with blighted wheat. It boosts qi, stops sweating and eliminates heat—not a specific for every sweat or every tidal heat.
Can Fu Xiao Mai be drunk daily as a sweat, fever or calm tea?
Vacuity sweating and steaming bone may enter a short formula; an exterior pattern only closes further as it astringes. “Blighted wheat must stop every sweat” does not replace assessment of the cause of sweating. Boosting qi, stopping sweating and eliminating heat should name 15–30 g, raw or slightly dry-fried.
How do you choose among Fu Xiao Mai, Ma Huang Gen, calcined Mu Li, Huang Qi and Mai Ya?
Blighted wheat is sweet-salty and cool: boosts qi, stops sweating and eliminates heat—spontaneous sweating, night sweating and steaming bone. Ephedra root is sweet-neutral: secures the exterior and stops sweating—vacuity spontaneous sweating. Calcined oyster shell is salty and slightly cold: constrains and secures, heavily settles and calms the spirit—spontaneous sweating, night sweating and seminal emission. Astragalus is sweet and slightly warm: supplements qi, raises yang, secures the exterior and stops sweating—qi-vacuity spontaneous sweating. Germinated barley is sweet-neutral: moves qi, disperses food, fortifies the Spleen, opens the appetite and stops lactation—food accumulation and weaning, not a sweat-stopping herb. Vacuity sweating and steaming bone favor Fu Xiao Mai (Mu Li San); qi-vacuity exterior weakness favors Huang Qi with Ma Huang Gen; slippery emission favors calcined Mu Li; food accumulation and stopping lactation favor Mai Ya. They may be paired; an uncleared exterior forbids astringing sweat with Fu Xiao Mai, Ma Huang Gen and calcined Mu Li.
Which herbs is Fu Xiao Mai combined with? What are the representative formulas?
Qi-vacuity spontaneous sweating joins astragalus, calcined oyster shell and ephedra root in Mu Li San. Yin-vacuity night sweating may join lycium bark and Rehmannia after pattern differentiation. Write Fu Xiao Mai 15–30 g; do not replace it with germinated barley or plump wheat.
How do you choose and store Fu Xiao Mai?
Choose slender, light, shriveled grains, pale yellow outside, starchy on the cut face, with a weak odor and a bland taste. Moldy, moth-eaten, plump heavy or dirty lots are discarded. Store dry against moths. Buy Fu Xiao Mai; do not replace boosting qi, stopping sweating and eliminating heat with germinated barley or food wheat by equal weight.

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.

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Fu Xiao Mai (Blighted Wheat): Secure the Exterior, Stop Sweating, and Clear Deficiency Heat