About This Herb
Traditional Chinese Medicine background and properties
Herb Description
Wu Ling Zhi is a warming herb derived from flying squirrel droppings, primarily used to relieve pain caused by blood stasis. It is commonly applied for menstrual cramps, postpartum abdominal pain, chest pain, and stomach pain. When stir-fried, it also helps stop bleeding that is accompanied by blood stasis, such as heavy or irregular periods.
Herb Category
Main Actions
- Invigorates Blood and Alleviates Pain
- Dispels Stasis and Stops Bleeding
- Resolves Accumulation
- Resolves Toxicity
How These Actions Work
'Invigorates Blood and alleviates pain' means Wu Ling Zhi actively promotes blood circulation and breaks up areas where blood has become stagnant and stuck. In TCM, when blood stops flowing smoothly, it causes sharp, stabbing, or fixed-location pain. Wu Ling Zhi enters the Liver channel's blood level and opens up the blood vessels to disperse stagnant blood, which is why it is considered an essential herb for any pain condition caused by blood stasis. This applies to menstrual cramps, postpartum abdominal pain, chest pain (as in angina), and stomach pain with a stabbing quality.
'Transforms stasis and stops bleeding' applies specifically to the stir-fried (炒) form of Wu Ling Zhi. When processed by dry-frying, the herb gains the ability to both break up old stagnant blood and stop abnormal bleeding at the same time. This dual action is particularly valuable when bleeding is caused by blood stasis, meaning the blood is not flowing in its proper channels. It is used for conditions like heavy menstrual bleeding with dark clots and lower abdominal pain, or uterine bleeding (崩漏) that has not responded to other treatments. The classical teaching states: 'use raw to move blood, use stir-fried to stop blood' (行血宜生，止血须炒).
'Resolves accumulation and eliminates toxins' refers to Wu Ling Zhi's secondary ability to treat childhood nutritional impairment (疳积), where poor digestion leads to accumulation and malnutrition. It also has a traditional use as an antidote for snake, scorpion, and centipede bites, applied both internally and externally with substances like realgar (雄黄).
Patterns Addressed
In TCM, symptoms cluster into recognizable patterns of disharmony that reveal what's out of balance in the body. Wu Ling Zhi 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 Wu Ling Zhi addresses this pattern
Wu Ling Zhi is a primary herb for Blood Stagnation because its bitter taste promotes downward movement and dispersion, its sweet taste moderates harshness, and its warm temperature activates sluggish blood flow. Entering the Liver channel's blood level, it directly addresses the Liver's role in ensuring the smooth flow of blood. When blood stagnates in the vessels, it causes sharp, stabbing, or fixed-location pain and can block menstrual flow. Wu Ling Zhi's core action of invigorating blood and alleviating pain makes it one of the most important herbs for any pain condition rooted in blood stasis, whether in the chest, epigastrium, abdomen, or uterus.
A practitioner would look for one or more of these signs
Stabbing chest pain with fixed location
Epigastric or abdominal pain that is sharp and piercing
Menstrual pain with dark clotted blood
Absence of menstruation due to blood stasis blocking the uterus
Why Wu Ling Zhi addresses this pattern
Wu Ling Zhi is especially suited for blood stasis centered in the lower abdomen and uterus. Its warm nature helps move congealed blood in the pelvic region, while its Liver channel affinity targets the organ responsible for storing blood and governing menstruation. Postpartum, when lochia (the normal post-birth discharge) fails to descend properly, stagnant blood accumulates in the uterus causing severe lower abdominal pain, fever, and headache. Wu Ling Zhi powerfully disperses this stagnant blood to restore normal flow. When stir-fried, it can simultaneously address abnormal uterine bleeding with clots, achieving the dual goal of stopping bleeding without trapping old stagnant blood inside.
A practitioner would look for one or more of these signs
Lower abdominal pain after childbirth with retained lochia
Heavy menstrual bleeding with dark purple clots
Severe cramping pain before or during menstruation
Irregular menstrual cycles with dark-colored blood
Why Wu Ling Zhi addresses this pattern
When blood stasis affects the Heart and chest region, it manifests as angina-like chest pain with a stabbing, fixed quality. Wu Ling Zhi's ability to open blood vessels and disperse stagnant blood extends to the cardiovascular system. Although it primarily enters the Liver channel, its blood-invigorating action is systemic. Modern clinical practice frequently pairs Wu Ling Zhi with other blood-moving and Qi-regulating herbs to treat coronary heart disease with angina, where blood stasis obstructs the Heart vessels. The warm nature of the herb also helps when cold constriction contributes to chest pain.
A practitioner would look for one or more of these signs
Chest pain with a stabbing or pricking quality
Heart palpitations accompanying chest discomfort
TCM Properties
Warm
Bitter (苦 kǔ), Sweet (甘 gān), Salty (咸 xián)
Animal — secretion (动物分泌物 dòng wù fēn mì wù)
This is partial information on the herb's TCM properties. More detailed information is available on the herb's dedicated page