About This Herb*
Traditional Chinese Medicine background and properties
Herb Description*
Field thistle is a cooling herb used primarily to stop bleeding caused by excess internal heat, especially blood in the urine, nosebleeds, and heavy menstrual bleeding. It also helps clear infections and reduce swollen, painful sores. Among the Blood-cooling hemostatic herbs, it is considered especially well suited for urinary bleeding and urinary tract complaints.
Herb Category*
Main Actions*
- Cools the Blood and Stops Bleeding
- Invigorates Blood and Reduces Swelling
- Resolves Toxicity and Expels Pus
- Promotes Urination and Relieves Stranguria
How These Actions Work*
'Cools Blood and stops bleeding' means Xiǎo Jì clears heat from the Blood level, calming down the reckless movement of Blood caused by excessive internal heat. When heat forces Blood out of the vessels, it can show up as nosebleeds, coughing up blood, blood in the urine, bloody stool, or heavy uterine bleeding with bright red blood. Xiǎo Jì's cool nature and its affinity for the Heart and Liver channels (both closely involved with Blood) allow it to target this heat directly. It is especially valued for blood in the urine (hematuria) and painful, bloody urination, making it a first-choice herb for these complaints.
'Disperses Blood Stasis and reduces swelling' means the herb does not simply plug up bleeding; it also moves old, stagnant Blood so that stopped bleeding does not turn into new blockages. This is an important quality: it stops bleeding without trapping stale Blood in the body, which could cause further problems like pain or masses.
'Resolves toxicity and treats abscesses' refers to the herb's ability to address hot, swollen, painful sores and boils (called 'heat toxin' in TCM). It can be taken internally or the fresh herb can be crushed and applied directly to the affected area.
'Promotes urination and relieves painful urinary dysfunction' means Xiǎo Jì helps open the urinary passages, reducing burning, frequency, and difficulty when urinating. This action, combined with its Blood-cooling effect, makes it particularly well suited for cases where blood appears in the urine along with painful, difficult urination, a condition TCM calls 'Blood painful urinary dysfunction' (血淋 xuè lín).
Patterns Addressed*
In TCM, symptoms cluster into recognizable patterns of disharmony that reveal what's out of balance in the body. Xiao Ji 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 Xiao Ji addresses this pattern
When internal heat enters the Blood level, it forces Blood out of the vessels, causing various bleeding symptoms with bright red blood. Xiǎo Jì is cool in nature, sweet and bitter in taste, and enters the Heart and Liver channels, both of which govern Blood. Its cooling action directly targets Blood-level heat, calming the reckless movement of Blood and stopping hemorrhage. Crucially, it disperses stasis at the same time, so the bleeding stops without trapping old Blood in the body.
A practitioner would look for one or more of these signs
Bright red nosebleeds from Blood Heat
Hematuria, the hallmark indication for this herb
Bloody stool with bright red blood
Hematemesis due to heat forcing Blood upward
Why Xiao Ji addresses this pattern
When Damp-Heat accumulates in the lower burner and damages the Blood vessels of the Bladder, blood seeps into the urine and urination becomes painful, burning, and frequent. Xiǎo Jì addresses this pattern through two complementary actions: it cools the Blood to stop the bleeding, and it promotes urination to drain the Damp-Heat downward and out. This dual action makes it the key herb for 'Blood painful urinary dysfunction' (血淋 xuè lín), and it is the reason Xiǎo Jì serves as the King herb in the classical formula Xiǎo Jì Yǐn Zǐ.
A practitioner would look for one or more of these signs
Bloody, painful urination
Burning, stinging pain during urination
Urgency and frequency from Bladder irritation
Why Xiao Ji addresses this pattern
When heat toxins accumulate, they cause red, swollen, painful sores and abscesses. Xiǎo Jì's cool, bitter nature allows it to clear heat toxins while its ability to move Blood helps resolve the swelling and stagnation underlying the abscess. The fresh herb is particularly effective and can be used both internally and externally (crushed and applied as a poultice).
A practitioner would look for one or more of these signs
Red, hot, swollen sores or boils
Painful skin lesions from heat toxins
TCM Properties*
Cool
Sweet (甘 gān), Bitter (苦 kǔ)
Whole plant / Aerial parts (全草 quán cǎo)
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.