Cang Er San
Classical TCM Formula Profile
Part of the HJMEDICAL TCM Discovery Center
苍耳子散 · Cāng Ěr Zǐ Sàn
A classical formula for nasal congestion and runny nose due to wind obstruction of the orifices, commonly used for sinus-type presentations with thick or clear discharge and frontal headache.
Read the complete guide →Quick Facts
- Formula Category
- Exterior-Releasing Formulas
- Primary Pattern
- Wind-Cold
- Primary Function
- Disperse wind, unblock the nose
- Primary Therapeutic Principle
- Disperse wind-cold and open the nasal orifices
- Classical Source
- Ji Sheng Fang (Yan Yonghe, Song dynasty)
- Available as Granules
- Yes
Formula Overview
A classical formula for nasal congestion and runny nose due to wind obstruction of the orifices, commonly used for sinus-type presentations with thick or clear discharge and frontal headache.
Therapeutic Principle
Traditionally selected when nasal congestion and loss of smell are the leading complaints from wind obstruction — a focused orifice-opening formula rather than a general exterior-releasing prescription.
Composition: Sovereign, Minister, Assistant, Envoy
Every herb in the formula, grouped by the job it does in the classical hierarchy.
君SovereignTreats the main pattern
臣MinisterReinforces the sovereign
佐AssistantTreats accompanying patterns
使EnvoyGuides and harmonises
Classical Composition
- Fructus Xanthii (Cang Er Zi) 9g
- Flos Magnoliae (Xin Yi) 9g
- Radix Angelicae Dahuricae (Bai Zhi) 9g
- Herba Menthae (Bo He) 3g
Dosages follow the classical source and are shown for study, not as a prescription.
Related Conditions
Related Health Topics
Actions
- Disperses wind
- unblocks the nose
- and treats deep-source nasal congestion.
Indications
- This formula is indicated for wind obstructing the nasal orifices (deep-source nasal congestion).
- Signs and symptoms include nasal blockage, turbid discharge, loss of smell, and frontal headache.
- The coating is thin and white or slightly yellow.
Traditional Pathogenesis
Cause & mechanism
- This pattern is due to externally contracted wind-cold that fetters the exterior and constrains lung qi.
Clinical presentation
- Wei yang is obstructed, the interstices close, and the lung fails to diffuse, producing aversion to cold, absence of sweating, body aches and a superficial tight pulse.
- Wind pathogens obstruct the nasal orifices, producing deep-source nasal congestion, turbid discharge and frontal headache.
Treatment strategy
- The correct method is to induce sweating to release the exterior and diffuse the lung.
- In this formula the emphasis is to disperse wind-cold and open the nasal orifices.
How does this formula compare?
Clinical Perspective
Cang Er San specifically unblocks the nasal orifices. Xin Yi San is a related orifice-opening formula. Yu Ping Feng San consolidates the exterior for recurrent episodes with Qi deficiency. Gui Zhi Tang releases exterior wind-cold more systemically without a nasal focus.
Clinical Differentiation
- Cang Er San is used for wind obstructing the nasal orifices (deep-source nasal congestion).
- The pattern is blockage, turbid discharge and frontal headache.
- It is distinguished from Xin Yi San (wind-cold nose without the same emphasis on deep-source turbidity) and from Xin Yi Qing Fei Tang (lung heat steaming the nose).
Safety notes: Several medicinals in this formula are dispersing and slightly drying. It is not appropriate for nasal dryness from yin deficiency without an exterior or turbid pathogen.
For educational reference only, based on traditional pattern differentiation — not a substitute for professional advice.
Frequently Asked Questions
What are the actions of Cang Er Zi San?
Cang Er Zi San has the actions of dispersing Wind, opening the nasal orifices, and relieving pain. It is the classic formula for unblocking the nose and treating nasal congestion with turbid discharge caused by Wind obstructing the nasal passages.
Which modern diseases is Cang Er Zi San suited to?
Modern TCM clinical practice commonly applies it to individuals whose pattern differentiation falls within Wind obstructing the nasal orifices, including allergic rhinitis, acute or chronic sinusitis (bi yuan), chronic rhinitis with persistent nasal congestion, and frontal headache or loss of smell associated with nasal obstruction and discharge.
Is Cang Er Zi San suitable for improving nasal congestion, turbid discharge, and frontal headache?
For presentations of nasal congestion, thick or turbid nasal discharge, reduced sense of smell, frontal or eyebrow-region headache, and symptoms linked to Wind invading the head and nose — in those whose pattern differentiation confirms Wind obstructing the nasal orifices — TCM commonly applies Cang Er Zi San as an adjunct. It cannot replace standard medical treatment.
Related Products
Nong's Cang Er San (Xanthium Powder) 5:1 Concentrated Granules
Hoi Tin Cang Er Zi San (Xanthium Fruit Powder) 5:1 Concentrated Granules
Related Articles
Cang Er Zi San: Classic TCM Formula for Nasal Congestion, Sinusitis & Wind-Heat in the Nose
Xin Yi San: Classic TCM Formula for Nasal Congestion, Sinusitis & Wind-Cold in the Nose
Gui Zhi Tang: Classic TCM Formula for Wind-Cold, Exterior Deficiency & Ying-Wei Imbalance
Yu Ping Feng San: Classic TCM Formula for Wei Qi Deficiency, Spontaneous Sweating & Frequent Colds
Browse all classical formulas →
Medical Disclaimer
For general TCM education only — not medical advice. Consult a qualified TCM practitioner or licensed healthcare provider before use, especially if pregnant, nursing, on medication, or managing a chronic condition.