TCM Herb Categories (中药分类): Understanding the 20 Major Groups of Chinese Medicinal Herbs
Learn how TCM organizes its vast materia medica into 20 major herb categories — from heat-clearing and blood-tonifying to exterior-releasing and spirit-calming — and why this system guides every prescription.
Why Herbs Are Grouped by Function
TCM’s materia medica contains hundreds of individual herbs, each with unique properties. To make this vast pharmacopeia manageable, herbs are organized into functional categories — groups of herbs that share a primary therapeutic action.
This classification system is not academic trivia. It is the practical foundation of every TCM prescription. When a practitioner identifies a patient’s pattern, they select herbs from the categories that address that pattern. A formula for Wind-Heat will draw from the “Cool-Acrid, Exterior-Releasing” category; a formula for Qi deficiency will draw from “Qi Tonics.”
Here are the 20 major herb categories in TCM pharmacology.
The 20 Major Categories
1. Herbs that Release the Exterior (解表药)
Function: Treat exterior patterns — colds, flu, early-stage respiratory infections. These herbs push pathogens out through the body’s surface.
Sub-categories:
| Type | Nature | Example Herbs | Best For |
|---|---|---|---|
| Warm-Acrid | Warm | Ma Huang, Gui Zhi, Zi Su Ye, Fang Feng | Wind-Cold — chills, no sweating, stiff neck |
| Cool-Acrid | Cool | Bo He, Ju Hua, Ge Gen, Chai Hu | Wind-Heat — fever, sore throat, yellow phlegm |
Key principle: Use these herbs early in an illness, when the pathogen is still at the surface. Do not use once the disease has penetrated to the organs.
2. Herbs that Clear Heat (清热药)
Function: Clear internal Heat from various sources — infections, inflammation, fever, toxic conditions.
Sub-categories:
| Type | Target | Example Herbs |
|---|---|---|
| Heat-clearing and fire-purging | High fever, excess Fire | Shi Gao, Zhi Mu, Huang Lian |
| Heat-clearing and damp-drying | Damp-Heat (GI, urinary) | Huang Qin, Huang Bo, Ku Shen |
| Heat-clearing and blood-cooling | Blood Heat (bleeding, rashes) | Sheng Di Huang, Mu Dan Pi, Chi Shao |
| Heat-clearing and toxin-resolving | Infections, boils, sore throat | Jin Yin Hua, Lian Qiao, Ban Lan Gen |
| Heat-clearing and deficiency-heat | Chronic low-grade fever | Qing Hao, Di Gu Pi, Yin Chai Hu |
This is the largest category in TCM pharmacology, reflecting the prevalence of Heat patterns in clinical practice.
3. Purgative Herbs (泻下药)
Function: Promote bowel movements, drain accumulations, remove excess Heat and dryness.
| Type | Strength | Example Herbs |
|---|---|---|
| Drastic purgatives | Strong | Da Huang (rhubarb), Mang Xiao |
| Lubricating laxatives | Gentle | Huo Ma Ren (hemp seed), Yu Li Ren |
| Harsh expellants | Very strong | Ba Dou (croton seed — rarely used) |
4. Herbs that Dispel Wind-Dampness (祛风湿药)
Function: Treat Bi syndrome (关节痛) — joint pain, stiffness, and heaviness caused by wind, cold, and dampness invading the meridians.
Example herbs: Du Huo, Qin Jiao, Sang Ji Sheng, Wei Ling Xian, Cang Zhu
Key uses: Arthritis, rheumatism, chronic back pain, sciatica
5. Herbs that Transform Dampness (化湿药)
Function: Resolve Dampness in the Spleen and Stomach — the “middle jiao” dampness that causes bloating, nausea, fatigue, and sticky sensations.
Example herbs: Huo Xiang, Cang Zhu, Hou Po, Sha Ren, Bai Dou Kou
Key uses: Nausea, bloating, loss of appetite, feeling of heaviness after eating
6. Herbs that Drain Dampness (利水渗湿药)
Function: Promote urination to drain excess fluids from the body — edema, urinary difficulty, water retention.
Example herbs: Fu Ling, Ze Xie, Yi Yi Ren, Che Qian Zi, Zhu Ling
Key uses: Edema, urinary tract infections, fluid retention, kidney stones
Difference from Category 5: Category 5 treats Dampness in the digestive system. Category 6 drains fluids through the urinary system.
7. Herbs that Warm the Interior (温里药)
Function: Warm the body from within — dispel Cold, warm the Spleen and Stomach, rescue devastated Yang.
Example herbs: Gan Jiang (dried ginger), Rou Gui (cinnamon bark), Fu Zi (aconite), Wu Zhu Yu, Xiao Hui Xiang
Key uses: Cold abdominal pain, vomiting clear fluid, diarrhea, cold extremities, Kidney Yang deficiency
8. Herbs that Regulate Qi (理气药)
Function: Move stagnant Qi, relieve distention, reduce pain from Qi stagnation.
Example herbs: Chen Pi, Mu Xiang, Xiang Fu, Zhi Ke, Tan Xiang
Key uses: Bloating, distention, emotional stress, rib-side pain, PMS
9. Herbs that Relieve Food Stasis (消食药)
Function: Help digest food that is stuck or stagnating — overeating, food accumulation, children’s digestive problems.
Example herbs: Shan Zha (hawthorn), Shen Qu (medicated leaven), Mai Ya (malt), Lai Fu Zi (radish seed), Ji Nei Jin (chicken gizzard lining)
Key uses: Bloating after eating, overindulgence, children’s indigestion, poor appetite
10. Herbs that Stop Bleeding (止血药)
Function: Stop various types of bleeding — nosebleeds, coughing blood, vomiting blood, blood in stool or urine, heavy menstrual bleeding.
Sub-categories:
| Type | Mechanism | Example Herbs |
|---|---|---|
| Cool blood and stop bleeding | For Blood Heat bleeding | Di Yu, Bai Mao Gen, Ce Bai Ye |
| Stasis-transforming and bleeding-stopping | For bleeding with stasis | San Qi, Pu Huang |
| Astringe and stop bleeding | For chronic leakage | Bai Ji, Xian He Cao |
| Warm and stop bleeding | For Cold-type bleeding | Ai Ye, Zao Xin Tu |
11. Herbs that Invigorate Blood and Remove Stasis (活血化瘀药)
Function: Break up stagnant Blood, restore circulation, relieve fixed stabbing pain.
Example herbs: Chuan Xiong, Dan Shen, Hong Hua, Tao Ren, Yan Hu Suo, Ji Xue Teng
Key uses: Menstrual pain with clots, chest pain, bruise recovery, cardiovascular support, chronic pain
12. Herbs that Relieve Cough and Wheezing (止咳化痰平喘药)
Function: Transform phlegm, stop cough, relieve wheezing and asthma.
Sub-categories:
| Type | Example Herbs |
|---|---|
| Warm-phlegm transformers | Ban Xia, Tian Nan Xing, Bai Qian |
| Cool-phlegm transformers | Zhe Bei Mu, Gua Lou, Qian Hu |
| Cough-and-wheezing relievers | Xing Ren, Su Zi, Bai Bu, Ting Li Zi |
13. Herbs that Calm the Spirit (安神药)
Function: Calm the Shen (spirit), promote sleep, reduce anxiety and palpitations.
Sub-categories:
| Type | Nature | Example Herbs |
|---|---|---|
| Heavy minerals and shells | Anchoring, grounding | Zhu Sha, Long Gu, Mu Li, Ci Shi |
| Nourishing plant-based | Gentle, restorative | Suan Zao Ren, Yuan Zhi, Bai Zi Ren, He Huan Pi |
14. Herbs that Extinguish Wind and Stop Tremors (平肝熄风药)
Function: Treat internal Wind — tremors, spasms, vertigo, headache, stroke sequelae, hypertension patterns.
Example herbs: Tian Ma, Gou Teng, Shi Jue Ming, Ling Yang Jiao, Quan Xie
15. Orifice-Opening Herbs (开窍药)
Function: Open the sensory orifices, restore consciousness — used in emergencies for fainting, seizures, stroke, severe Heat entering the Pericardium.
Example herbs: She Xiang (musk), Bing Pian (borneol), Shi Chang Pu (sweetflag), Su He Xiang
16. Tonifying Herbs (补虚药)
Function: Replenish deficiency — the largest and most commonly used category in daily practice. Tonics address what is lacking.
Sub-categories:
| Type | Replenishes | Example Herbs |
|---|---|---|
| Qi tonics | Qi (energy) | Ren Shen, Huang Qi, Bai Zhu, Gan Cao, Shan Yao |
| Blood tonics | Blood | Dang Gui, Shu Di Huang, Bai Shao, E Jiao, Long Yan Rou |
| Yang tonics | Kidney Yang | Yin Yang Huo, Rou Cong Rong, Du Zhong, Ba Ji Tian, Tu Si Zi |
| Yin tonics | Yin (fluids) | Shu Di Huang, Mai Men Dong, Gou Qi Zi, Nu Zhen Zi, Shi Hu |
17. Astringent Herbs (收涩药)
Function: Hold things in — prevent excessive leakage of Qi, fluids, or essence. Stop sweating, diarrhea, frequent urination, premature ejaculation.
Example herbs: Wu Wei Zi, Shan Zhu Yu, Jin Ying Zi, Qian Shi, Fu Pen Zi
18-20. Additional Categories
| Category | Function | Example Herbs |
|---|---|---|
| Herbs that Expel Parasites (驱虫药) | Kill intestinal parasites | Ku Lian Pi, Bing Lang, Shi Jun Zi |
| Substances for External Use (外用药) | Topical treatment of skin, wounds | Liu Huang, Ming Fan, Lu Hui |
| Vomiting-Inducing Herbs (涌吐药) | Induce vomiting (rarely used today) | Gua Di, Li Lu |
How Categories Guide Prescriptions
When a TCM practitioner writes a formula, they typically select herbs from multiple categories to address the full pattern:
Example: A patient with Spleen Qi deficiency, Dampness, and Blood stasis
| Role | Category | Herb |
|---|---|---|
| Chief | Qi tonic (Cat 16) | Huang Qi |
| Deputy | Damp-draining (Cat 6) | Fu Ling |
| Deputy | Dampness-transforming (Cat 5) | Cang Zhu |
| Assistant | Blood-invigorating (Cat 11) | Dan Shen |
| Envoy | Qi-regulating (Cat 8) | Chen Pi |
| Envoy | Harmonizer | Gan Cao |
This multi-category approach is why TCM formulas are holistic — they address the root pattern and its branches simultaneously.
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FAQ
Who is this article for?
Readers who want an organized overview of how TCM classifies its herbs — the 'menu' of therapeutic tools available to a practitioner.
Can this article replace professional medical advice?
No. This content is educational only and does not replace diagnosis or treatment from a qualified healthcare professional.
Disclaimer
This content is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional for diagnosis and treatment.