About This Herb*
Traditional Chinese Medicine background and properties
Herb Description*
Ze Lan (Bugleweed herb) is a gentle Blood-moving herb traditionally valued in women's health for regulating menstruation, easing period pain, and helping recovery after childbirth. It also has a mild water-draining action, making it useful for certain types of swelling. Classical texts describe it as effective yet mild, meaning it promotes circulation without being too aggressive on the body.
Herb Category*
Main Actions*
- Invigorates Blood and Regulates Menstruation
- Invigorates Blood and Alleviates Pain
- Disperses Swelling and Dissipates Abscesses
- Promotes Urination and Reduces Edema
How These Actions Work*
'Invigorates Blood and regulates menstruation' means Ze Lan gently promotes blood circulation through the uterus and Liver channel, helping to restore a regular menstrual cycle. It is the herb's core action and the reason it has been called a 'key herb for women's medicine' across many classical texts. Its bitter and acrid taste combined with slightly warm nature allows it to move Blood without being overly harsh, making it suitable for menstrual irregularities, absent periods, painful periods, and postpartum abdominal pain caused by lingering Blood stasis.
'Dispels Blood stasis and relieves pain' refers to Ze Lan's ability to break up old, stagnant blood that causes pain after injury or surgery. Because it enters the Liver (which stores Blood) and the Spleen (which holds Blood in the vessels), it is used for traumatic injuries with bruising and swelling, as well as for abdominal masses. Classical sources describe it as 'moving without being aggressive' (行而不峻), meaning it circulates Blood effectively but gently compared to stronger stasis-breaking herbs.
'Reduces swelling and disperses abscesses' means Ze Lan can be applied topically or taken internally to help resolve early-stage boils, sores, and swollen tissue. Its Blood-moving action helps clear the local stagnation that underlies many types of swelling and infection.
'Promotes urination and reduces edema' means Ze Lan has a mild diuretic effect that helps the body eliminate excess fluid. This is especially relevant when fluid retention coexists with Blood stasis, as commonly seen in postpartum edema or abdominal fluid accumulation (ascites). This water-regulating effect is relatively gentle, so Ze Lan is typically combined with stronger diuretic herbs like Fang Ji (Stephania root) for this purpose.
Patterns Addressed*
In TCM, symptoms cluster into recognizable patterns of disharmony that reveal what's out of balance in the body. Ze Lan 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 Ze Lan addresses this pattern
Ze Lan directly addresses Blood Stagnation through its bitter, acrid, and slightly warm nature. The acrid taste disperses and moves, while the bitter taste descends and drains. Together with its slight warmth, these properties drive stagnant Blood out of the Liver and Spleen channels. Ze Lan is particularly effective for Blood stasis affecting the lower abdomen and uterus, where it restores the free flow of Blood through the Chong and Ren vessels. Classical sources note it 'breaks old Blood' (破宿血) and 'disperses masses' (消症瘕), reflecting its ability to address both acute stasis from injury and chronic accumulation.
A practitioner would look for one or more of these signs
Painful periods with dark, clotted menstrual blood
Absent periods due to Blood stasis rather than deficiency
Fixed, stabbing lower abdominal pain that worsens with pressure
Persistent bruising or swelling from traumatic injury
Why Ze Lan addresses this pattern
Ze Lan enters the Liver channel and has a particular affinity for the lower abdomen and uterus. Its slightly warm, acrid nature gently warms the Blood vessels of the Chong and Ren meridians and pushes stagnant Blood through them, which is why it has been called a 'key herb for women's medicine' (女科要药). In postpartum situations, lochia (the blood and tissue discharged after birth) can stagnate rather than flowing freely, causing severe abdominal and lower back pain. Ze Lan's Blood-invigorating action directly resolves this stagnation, helping the uterus return to normal.
A practitioner would look for one or more of these signs
Period pain with clots and dark blood
Abdominal pain after childbirth from retained lochia
Scanty, irregular periods gradually progressing toward amenorrhoea
Why Ze Lan addresses this pattern
Ze Lan uniquely addresses situations where Blood stasis and fluid retention occur together. Through its Spleen channel entry, it supports the Spleen's role in transforming and transporting fluids, while its Liver channel entry addresses the underlying Blood stagnation. This dual action on both Blood and water metabolism makes it especially suitable for edema that develops alongside Blood stasis, as commonly seen postpartum or in chronic liver disease with ascites. Its mild diuretic effect works in concert with its Blood-moving action, because in TCM theory, stagnant Blood can obstruct the water pathways, and resolving one helps resolve the other.
A practitioner would look for one or more of these signs
Facial and limb swelling, especially postpartum
Abdominal fluid accumulation with underlying Blood stasis
Reduced urination accompanying swelling
TCM Properties*
Slightly Warm
Bitter (苦 kǔ), Acrid / Pungent (辛 xīn)
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.