Ze Lan (泽兰): Lycopus in TCM — The Herb That Moves Both Blood and Water
Discover Ze Lan (Lycopus/Bugleweed), a unique TCM herb that simultaneously invigorates blood circulation and resolves edema — making it ideal for menstrual disorders with bloating, postpartum swelling, and conditions where blood stasis and fluid retention coexist.
What Is Ze Lan?
Ze Lan (泽兰), meaning “marsh orchid,” is the dried aerial parts of Lycopus lucidus Turcz., a perennial herb in the mint family (Lamiaceae). In TCM, it holds a distinctive position as one of the few herbs that simultaneously invigorates blood and resolves water retention — addressing two pathological processes that frequently occur together.
This dual blood-water action makes Ze Lan especially valuable in gynecological practice, where menstrual disorders often involve both blood stasis (clots, pain) and fluid accumulation (bloating, edema).
Basic Information
| Property | Details |
|---|---|
| Chinese name | 泽兰 (Zé Lán) |
| English name | Lycopus, Shiny Bugleweed |
| Pharmaceutical name | Lycopi Herba |
| Source | Above-ground parts of Lycopus lucidus |
| Nature | Slightly warm |
| Flavor | Bitter, slightly acrid |
| Meridian affinity | Liver, Spleen |
| Dosage | 10–15g (decoction) |
TCM Properties and Actions
Primary Actions
- Invigorates blood and dispels stasis — moves stagnant blood
- Promotes urination and resolves edema — drains excess fluid
- Regulates menstruation — treats menstrual irregularities
- Dispels swelling — reduces inflammatory swelling
The Dual Blood-Water Mechanism
In TCM pathology, blood stasis and fluid retention often develop together:
- Stagnant blood obstructs fluid metabolism → water accumulates
- Fluid accumulation compresses vessels → blood stagnates further
- This vicious cycle is common in menstrual disorders, injuries, and chronic conditions
Ze Lan breaks this cycle by treating both sides simultaneously — moving blood to restore circulation while draining excess fluid.
Clinical Applications
1. Menstrual Disorders (月经病)
Ze Lan is primarily a gynecological herb:
- Dysmenorrhea — stabbing menstrual pain with dark clots
- Premenstrual edema — bloating and water retention before periods
- Irregular menstruation — delayed or absent periods from stasis
- Postpartum pain — abdominal pain from retained blood
- Typically combined with Yi Mu Cao (Motherwort), Dang Gui, Chuan Xiong
2. Postpartum Recovery (产后恢复)
- Abdominal pain from retained lochia (postpartum discharge)
- Postpartum edema — swelling that persists after childbirth
- Promotes discharge of retained blood and fluids
- Combined with Tao Ren (Peach Kernel), Pao Jiang (Ginger), Dang Gui
3. Traumatic Injuries (跌打损伤)
- Injuries with both bruising (blood stasis) and swelling (fluid accumulation)
- The dual blood-water action is particularly suited to this presentation
- Combined with Ru Xiang, Mo Yao, Hong Hua
4. Edema from Blood Stasis (瘀血水肿)
- Lower body edema with dark, purplish skin discoloration
- Edema that worsens with menstrual cycles
- Fluid retention related to chronic blood stasis
- Combined with Fu Ling (Poria), Ze Xie (Alisma), Bai Zhu
5. Breast Conditions (乳腺病)
- Breast distension and pain before menstruation
- Early-stage breast abscess with swelling
- Combined with Chai Hu (Bupleurum), Xiang Fu (Cyperus)
Classic Pairings
| Pairing | Purpose |
|---|---|
| Ze Lan + Yi Mu Cao | Classic gynecological pair — synergistic blood invigoration |
| Ze Lan + Dang Gui | Nourishes blood while moving it — balanced treatment |
| Ze Lan + Chuan Xiong | Enhanced Qi-blood movement for pain relief |
| Ze Lan + Fu Ling + Ze Xie | Stronger edema resolution with blood-moving support |
| Ze Lan + Tao Ren + Hong Hua | More powerful blood stasis removal |
Ze Lan vs. Related Herbs
| Herb | Moves Blood | Moves Water | Best For |
|---|---|---|---|
| Ze Lan | ✓✓ | ✓✓ | Blood stasis + edema together |
| Yi Mu Cao | ✓✓✓ | ✓ | Blood stasis, Heart calming |
| Dan Shen | ✓✓✓ | — | Blood stasis, Heart conditions |
| Ze Xie | — | ✓✓✓ | Pure water/dampness without stasis |
| Chuan Xiong | ✓✓✓ | — | Qi-blood stagnation, headache |
| Yi Yi Ren | — | ✓✓ | Dampness, abscesses |
Preparation and Usage
Decoction (Standard Method)
- Dose: 10–15g per day
- No special preparation required — add directly to decoction
- Can increase to 20–30g for significant edema
- Decoct for 20–30 minutes with other herbs
External Use
- Fresh herb: Crush and apply to bruises and swelling
- Decoction wash: For skin conditions with stasis and swelling
- Compress: Soak cloth in strong decoction and apply to affected area
Quality Indicators
- Color: Green-brown stems with purple tinge
- Leaves: Lance-shaped, dark green, slightly serrated
- Aroma: Mild, characteristic mint-family scent
- Best quality: Harvested during flowering season
Modern Research
Pharmacological Studies
- Diuretic effect: Promotes urine output, supporting the edema-resolving action
- Anti-inflammatory: Reduces inflammatory markers in studies
- Anticoagulant: Mild blood-thinning effects consistent with blood-invigorating properties
- Uterine regulation: Influences uterine smooth muscle, supporting gynecological use
- Antioxidant: Protects against oxidative stress
Precautions and Contraindications
| Situation | Guidance |
|---|---|
| Pregnancy | Use with caution — blood-moving properties |
| Blood deficiency without stasis | Do not use — may worsen deficiency |
| Heavy menstrual bleeding (deficiency type) | Not suitable — may increase flow |
| Severe Qi deficiency | Combine with Qi tonics to prevent further depletion |
Key Takeaways
- Ze Lan is uniquely valued for simultaneously treating blood stasis and fluid retention
- Primarily used in gynecology — menstrual pain, premenstrual edema, postpartum conditions
- The classic pairing with Yi Mu Cao is a staple of TCM gynecological practice
- Also effective for injuries with both bruising and swelling
- Relatively gentle and well-tolerated compared to stronger blood-moving herbs
Disclaimer: This article is for educational purposes only. Consult a licensed TCM practitioner before using Ze Lan or any herbal preparation.
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FAQ
What makes Ze Lan unique among blood-moving herbs in TCM?
Ze Lan is unique because it simultaneously invigorates blood circulation AND resolves edema (fluid retention). Most blood-moving herbs only address blood stasis, but Ze Lan treats both blood stagnation and water accumulation together. This dual action makes it especially effective for conditions like menstrual edema (water retention before periods), postpartum swelling, and injuries where both bruising and swelling are present.
How is Ze Lan different from Yi Mu Cao (Motherwort)?
Ze Lan and Yi Mu Cao are often used together in gynecological formulas because both invigorate blood and regulate menstruation. The key difference is that Ze Lan also strongly resolves edema (moves water), while Yi Mu Cao has a stronger calming effect on the Heart and Shen (spirit). Ze Lan is better when there is concurrent water retention, while Yi Mu Cao is preferred when emotional factors or palpitations accompany the gynecological symptoms.
Disclaimer
This content is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before using any herbal preparation.