About This Herb*
Traditional Chinese Medicine background and properties
Herb Description*
Stellaria root is a gentle cooling herb used in Chinese medicine to address persistent low-grade fevers and night sweats caused by the body's internal cooling reserves (Yin) being depleted. It is especially valued for treating childhood malnutrition with fever and is a key ingredient in Wu Ji Bai Feng Wan, one of the most widely used women's health formulas in China. Despite its name, Stellaria root (Yin Chai Hu) is completely unrelated to Bupleurum root (Chai Hu) and has very different uses.
Herb Category*
Main Actions*
- Clears Deficiency Heat
- Clears Childhood Nutritional Impairment Heat
- Cools the Blood
How These Actions Work*
'Clears deficiency Heat' means this herb addresses a specific type of low-grade, lingering fever that arises not from an infection, but from the body's own cooling reserves (Yin) being depleted. When Yin is insufficient, the body's warming functions go unchecked, producing symptoms like afternoon or evening fevers, feeling hot in the palms, soles, and chest (called 'five-centre heat'), night sweats, and a flushed face. Yin Chai Hu is considered a specialist for this type of Heat, particularly what classical texts call 'steaming bone disorder' (a deep-seated Heat felt in the bones). A key advantage of Yin Chai Hu is that it clears this Heat gently, without the harsh bitter-cold draining qualities of many other Heat-clearing herbs, making it less likely to further damage the already weakened Yin.
'Clears childhood malnutrition Heat' refers to a condition in Chinese paediatric medicine called 'gan ji' (疳积), where a child develops fever, irritability, thirst, abdominal distension, and emaciation due to poor nutrition or chronic digestive dysfunction. The Heat generated in this condition is a specific form of deficiency Heat, and Yin Chai Hu is considered one of the primary herbs for addressing it.
'Cools Blood' means that when Heat enters the Blood level of the body, it can cause the Blood to move recklessly outside its normal pathways, leading to various types of bleeding such as nosebleeds, blood in the urine, or abnormal uterine bleeding. Yin Chai Hu's gentle cooling action can help settle the Blood. Classical sources such as the Ben Jing Feng Yuan note that it 'not only clears Heat, but also cools Blood.'
Patterns Addressed*
In TCM, symptoms cluster into recognizable patterns of disharmony that reveal what's out of balance in the body. Yin Chai Hu 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 Yin Chai Hu addresses this pattern
When Yin (the body's cooling, nourishing substances) becomes depleted, internal Heat arises unchecked. This leads to characteristic signs like afternoon or evening low-grade fever, night sweats, a sensation of heat in the palms and soles, and a thin rapid pulse. Yin Chai Hu is sweet and slightly cool, entering the Liver and Stomach channels. Its sweet flavour gently nourishes without further depleting Yin, while its cool nature directly addresses the deficiency Heat. Unlike bitter-cold herbs that can drain fluids and worsen Yin depletion, Yin Chai Hu clears Heat without damaging the body's reserves, making it ideal for this pattern. Classical texts describe it as able to 'clear Heat from the bone marrow' without the harsh draining effects of stronger cold herbs.
A practitioner would look for one or more of these signs
Especially pronounced during sleep
Afternoon or evening tidal fever
Five-centre heat: palms, soles, and chest
Restlessness and irritability from internal Heat
Why Yin Chai Hu addresses this pattern
When Heat enters the Blood level, it can cause the Blood to move recklessly outside the vessels, leading to various types of bleeding. Yin Chai Hu enters the Liver channel, which stores the Blood, and its cool nature helps settle Heat in the Blood layer. Classical sources including the Ben Jing Feng Yuan specifically note that Yin Chai Hu 'not only clears Heat, but also cools Blood.' This action makes it useful for bleeding conditions arising from Blood Heat, though it is typically combined with stronger Blood-cooling herbs when bleeding is the primary concern.
A practitioner would look for one or more of these signs
Blood in the urine from Blood Heat
Uterine bleeding due to Heat disturbing the Blood
Heat forcing Blood upward
TCM Properties*
Slightly Cool
Sweet (甘 gān)
Root (根 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.