About This Herb*
Traditional Chinese Medicine background and properties
Herb Description*
Mai Dong is one of the most widely used Yin-nourishing herbs in Chinese medicine, prized for its ability to moisten dryness and replenish body fluids. It is commonly used for dry cough, dry mouth and throat, irritability, insomnia, and constipation caused by insufficient body fluids. Its gentle, cooling nature makes it suitable for everyday use in teas and soups, and it has a long history as both a food and a medicine in China.
Herb Category*
Main Actions*
- Nourishes Yin and Generates Fluids
- Moistens the Lungs and Stops Cough
- Clears Heart Fire and Eliminates Irritability
- Benefits the Stomach and Generates Fluids
- Moistens the Intestines and Unblocks the Bowels
How These Actions Work*
'Nourishes Yin and generates fluids' means Mai Dong replenishes the body's moistening, cooling fluids (Yin and Jin-Ye). When the body lacks these fluids, whether from fever, chronic illness, dry climate, or simply aging, symptoms like dry mouth, thirst, dry skin, and a parched feeling in the throat can appear. Mai Dong's sweet, slightly cool nature directly restores these fluids. This is the herb's most fundamental action and the reason it appears in so many classical formulas.
'Moistens the Lungs and stops cough' means Mai Dong supplies moisture to the Lung system, which in TCM governs the respiratory tract and skin. When the Lungs become dry, whether from dry air, smoking, prolonged coughing, or a lingering illness, the result is a dry, hacking cough with little or no phlegm, a scratchy throat, or a hoarse voice. Mai Dong's cooling moisture calms the irritation and stops the cough. It is especially suited to dry coughs rather than coughs with copious phlegm.
'Clears Heart fire and eliminates irritability' refers to Mai Dong's ability to calm the mind when emotional restlessness, insomnia, or palpitations arise from insufficient Heart Yin. In TCM, when the Heart's cooling fluids are depleted, 'virtual Heat' flares up, causing an agitated, restless state. Mai Dong enters the Heart channel and nourishes Heart Yin, gently cooling this Heat and calming the spirit.
'Benefits the Stomach and promotes fluid production' describes how Mai Dong restores the Stomach's digestive juices. When the Stomach becomes too dry (Stomach Yin Deficiency), a person may feel nauseous, have no appetite, experience a dry mouth with a desire to sip water, or have hiccups. Mai Dong moistens the Stomach lining and promotes the natural production of digestive fluids.
'Moistens the intestines and unblocks the bowels' applies when constipation results from a lack of internal moisture rather than from excess Heat or stagnation. Elderly patients or those recovering from illness often develop dry, hard stools because their body fluids are depleted. Mai Dong's rich, moistening quality lubricates the intestines and eases bowel movements.
Patterns Addressed*
In TCM, symptoms cluster into recognizable patterns of disharmony that reveal what's out of balance in the body. Mai Dong is traditionally associated with these specific patterns.
The following describes this herb's classification within Traditional Chinese Medicine theory and is provided for educational purposes only.
Why Mai Dong addresses this pattern
Lung Yin Deficiency is a state of chronic dryness in the respiratory system. The Lungs lack the moistening fluids needed to keep the airways comfortable and to prevent a dry cough. Mai Dong enters the Lung channel and has a sweet, slightly bitter, slightly cool nature that is perfectly suited to nourish Lung Yin, generate fluids, and gently clear the deficiency Heat that accompanies Yin depletion. Its moistening quality directly counters the dryness at the root of this pattern, while its cooling nature calms the low-grade Heat that arises when Yin is insufficient.
A practitioner would look for one or more of these signs
Dry cough with little or no phlegm, worse at night
Persistent dry, scratchy throat
Hoarse voice from chronic dryness
Night sweats or afternoon low-grade fever
Why Mai Dong addresses this pattern
When the Stomach lacks sufficient Yin fluids, it cannot properly ripen and transform food, and dryness dominates the middle digestive region. Mai Dong's sweet taste directly nourishes Stomach Yin and generates digestive fluids, while its slight bitterness gently descends Stomach Qi to counter the nausea and hiccups that arise when Stomach Qi rebels upward. As classical texts note, Mai Dong 'specialises in supplementing Stomach Yin and enriching the fluids.' Its slightly cool temperature also clears the mild Stomach Heat that often accompanies Yin depletion.
A practitioner would look for one or more of these signs
Dry mouth with desire to sip fluids
Reduced appetite with no hunger sensation
Nausea or dry heaves
Dry stools from fluid depletion
Why Mai Dong addresses this pattern
Heart Yin Deficiency produces restlessness, insomnia, and palpitations because the Heart's cooling, anchoring fluids can no longer restrain the Heart's activity. Mai Dong enters the Heart channel and nourishes Heart Yin, calming the 'virtual fire' that flares when Yin is depleted. Its sweet, cool properties are ideally suited to moisten and settle the Heart, reducing irritability and promoting restful sleep without sedation.
A practitioner would look for one or more of these signs
Difficulty falling asleep with mental restlessness
Heart palpitations worse at rest
Irritability and feeling of internal heat
Why Mai Dong addresses this pattern
When both Qi and Yin are depleted, as happens after prolonged fever, heavy sweating, or chronic illness, the body lacks both vital force and nourishing fluids. Mai Dong addresses the Yin side of this dual deficiency by replenishing fluids and cooling the residual Heat. In classical formulas for this pattern (most notably Sheng Mai San), Mai Dong is paired with Qi-tonifying herbs to simultaneously restore fluids and rebuild Qi, since the two are interdependent: Qi moves and produces fluids, while fluids sustain and anchor Qi.
A practitioner would look for one or more of these signs
Fatigue with shortness of breath
Spontaneous sweating or excessive sweating
Thirst with dry mouth and throat
TCM Properties*
Slightly Cool
Sweet (甘 gān), Bitter (苦 kǔ)
Tuber (块茎 kuài jīng / 块根 kuài gēn)
This is partial information on the herb's TCM properties. More detailed information is available on the herb's dedicated page
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.