Chronic Cough & Phlegm Resolved in Five Doses: A Fengyang Daoist TCM Case Study by Chen Qingzhen

Abstract: A 47-year-old male patient (Mr. Quan) presented with a productive cough lasting over one month. Fengyang Daoist physician Chen Qingzhen observed a red tongue with yellow turbid greasy coating and sublingual varices (++), differentiating the pattern as phlegm-heat obstructing the lung, complicated by blood stasis. A five-dose herbal formula—clearing heat, transforming phlegm, diffusing and descending lung qi, and strengthening the spleen—resolved the cough and phlegm. This is a real academic case record preserving the original prescription, with full formula analysis and clinical insights.

⚠️ For TCM academic exchange only. Herbs require individualized pattern differentiation—do NOT copy this formula for self-medication. Consult a qualified TCM practitioner.

I. Case at a Glance

Item	Details
Initial Visit	August 23, 2026
Patient	Mr. Quan, male, 47 years old
Chief Complaint	Cough with profuse phlegm lasting over one month
Tongue	Red tongue body; yellow turbid greasy coating; sublingual varices (++)
Pattern	Phlegm-heat obstructing the lung, with blood stasis
Treatment Principle	Clear heat, transform phlegm; diffuse & descend lung qi; fortify spleen and drain dampness
Course	5 doses total; 1 dose daily, decocted in water
Follow-up	August 31, 2026 (WeChat) — cough and phlegm essentially resolved

II. Tongue Diagnosis: What the Tongue Reveals

Tongue diagnosis was the key to differentiating this case. Three layers of information emerged:

Tongue Sign	TCM Interpretation	Pathomechanism Indicated
Red tongue body	Red color indicates heat	Internal heat (excess heat or phlegm transforming into heat)
Yellow turbid greasy coating	Yellow = heat; greasy = dampness; turbid = dense phlegm-turbidity	Phlegm-heat congealing, obstructing lung collaterals
Sublingual varices (++)	Bluish-purple, tortuous sublingual veins; moderate stasis	Chronic disease entering the collaterals; complicated by blood stasis

The combination of a yellow turbid greasy coating and sublingual varices (++) is direct evidence of the pattern "phlegm-heat in the lung with concurrent stasis." This is also why blood-invigorating and phlegm-transforming agents were included.

III. Pattern Differentiation: Why "Phlegm-Heat in the Lung with Stasis"?

The patient's cough and phlegm persisted over one month, placing it in the "chronic cough" category. Physician Chen's analysis:

Phlegm-heat obstructing the lung (primary): Internal phlegm-turbidity transformed into heat; phlegm-heat congested the lung, impairing dispersion and descent → cough with copious phlegm.
Impaired qi mechanism: Stagnant lung qi with disordered ascending/descending → phlegm rising with rebellious qi, triggering cough.
Chronic disease with blood stasis: After a month of coughing, qi stagnation leads to blood stasis—corroborated by the (++) sublingual varices.
Spleen deficiency generating phlegm (root): TCM holds that "the spleen is the source of phlegm; the lung is the container of phlegm" (Zhengzhi Huibu). Chronic phlegmo-dampness ultimately stems from impaired spleen transportation.

Strategy: Clear heat and transform phlegm (treat the manifestation); diffuse and descend lung qi (stop the cough); fortify the spleen and drain dampness (eliminate the source of phlegm)—treating root and branch together, harmonizing lung and spleen.

IV. Prescription & Formula Analysis

Full Prescription

Shan Hailuo (Codonopsis lanceolata) 20g, Jiegeng (Platycodon grandiflorus) 10g, Xingren (Armeniaca vulgaris) 10g, Yuxingcao (Houttuynia cordata) 10g, Fabanxia (Pinellia ternata, prepared) 10g, Juhong (Citrus reticulata, red peel) 10g, Gualou (Trichosanthes kirilowii) 10g, Zhuru (Bamboo shavings) 10g, Fuling (Poria cocos) 10g, Yiyiren (Coix lacryma-jobi) 15g, Biandouhua (Hyacinth bean flower) 10g (added near end).

5 doses total; 1 dose daily, decocted in water.

Formula Analysis by Functional Group

Group	Herbs	Action	Significance
① Clear Heat & Transform Phlegm	Yuxingcao 10g, Gualou 10g, Zhuru 10g, Shan Hailuo 20g	Clear heat, resolve toxicity, clear heat-phlegm, loosen the chest	Directly clears lung phlegm-heat. Yuxingcao clears lung heat and discharges pus; Gualou clears heat, scours phlegm, and opens the chest; Zhuru clears heat-phlegm and arrests vomiting; Shan Hailuo (monarch, 20g) boosts qi, nourishes yin, clears the lung, and dissipates nodules
② Diffuse & Descend Lung Qi	Jiegeng 10g, Xingren 10g	Diffuse lung, benefit throat; descend qi, stop cough	One ascending, one descending—restores the lung's dispersing/descending function. Jiegeng diffuses lung qi and expels phlegm (up); Xingren descends qi to relieve cough and calm wheezing (down). Together, the airways open
③ Dry Dampness & Transform Phlegm	Fabanxia 10g, Juhong 10g	Dry dampness, transform phlegm, regulate qi and harmonize the middle	Reflects the "Two Aged" (Erchen) intent. Banxia dries dampness and transforms phlegm; Juhong regulates qi and transforms phlegm. When qi flows smoothly, phlegm disperses; when phlegm disperses, coughing stops
④ Fortify Spleen & Drain Dampness	Fuling 10g, Yiyiren 15g, Biandouhua 10g (added near end)	Strengthen spleen, drain dampness, cut off the phlegm source	Treats the root. Fuling fortifies the spleen and drains dampness; Yiyiren promotes urination, drains dampness, clears heat, and discharges pus; Biandouhua is light and aromatic, transforming turbidity and awakening the spleen (added near the end to preserve volatile components)

🌿 Overall Assessment

The formula centers on Shan Hailuo at 20g as the monarch herb—boosting qi, nourishing yin, clearing the lung, and transforming phlegm. It is supported by Yuxingcao, Gualou, and Zhuru to directly strike phlegm-heat; Jiegeng and Xingren to regulate lung qi through ascending and descending; Banxia and Juhong to regulate qi and transform phlegm; and Fuling, Yiyiren, and Biandouhua to fortify the spleen and drain dampness, thereby eliminating the source of phlegm.

Clearing, diffusing, descending, transforming, and spleen-fortifying—five methods operating in concert, addressing both root and manifestation, harmonizing lung and spleen. Hence a cough lasting over a month resolved in just five doses.

V. Lifestyle Guidance: The TCM Rationale Behind Four Orders

The physician's specific care instructions each target the pattern directly:

Instruction	TCM Rationale
Limit tobacco & alcohol; eat a light diet	Tobacco, alcohol, and spicy foods generate heat and phlegm. A light diet reduces spleen-stomach burden and prevents phlegm regeneration
Avoid raw, cold, and iced foods	As the Ling Shu states, "cold body and cold drinks damage the lung." Icy/cold items directly injure lung yang and congeal qi, making phlegm harder to resolve
Avoid exposure to wind; no bare-chested air conditioning or fans	The lung is the "delicate organ" governing skin and body hair. Sweating followed by wind lets pathogenic wind invade the lung, causing relapse
Minimize staying up late	Late nights consume yin fluids; yin deficiency leads to deficient fire flaming upward to scorch the lung, worsening phlegm-heat. Adequate sleep supports the recovery of righteous qi

💡 The two most overlooked orders—avoiding cold/raw items and avoiding bare-chested wind exposure—are exactly what prevents relapse. Many patients improve with herbs, only to undo the benefit with one iced drink or a night under air conditioning.

VI. Follow-Up Outcome

August 31, 2026 (8 days after starting herbs) — WeChat follow-up: the patient reported that the cough and phlegm had essentially resolved.

From "productive cough lasting over a month" to "essentially resolved" in just five doses—this reflects the Fengyang Daoist clinical hallmark of precise pattern differentiation with focused, potent formulas.

VII. Clinical Insights

Key Point	Insight
Chronic cough: treat the lung, but also the spleen	"The spleen is the source of phlegm; the lung is its container." Treating the lung alone leads to relapse; fortifying the spleen and draining dampness eliminates the root
Diffusing and descending are interdependent	Jiegeng diffuses; Xingren descends. Restoring the lung's dispersing/descending function is more fundamental than simply suppressing cough
A turbid yellow greasy coating indicates dense phlegm-heat	The "turbid" quality signals deep phlegm-turbidity, requiring heavier cleaving agents (e.g., Shan Hailuo, Gualou)
Sublingual varices signal chronic disease entering the collaterals	In coughs lasting over a month, watch for complicating blood stasis; (++) sublingual varices is the signal
Lifestyle orders are as important as the prescription	Avoiding cold/raw foods and wind exposure is essential to prevent recurrence

VIII. ⚠️ Important: Rule Out Organic Causes First

A cough lasting more than 8 weeks in adults is classified as "chronic cough." Although this case (just over one month) resolved in five doses, any persistent cough must first be evaluated to exclude organic disease, including:

Infectious conditions such as pneumonia and bronchitis

Pulmonary tuberculosis

Cough-variant asthma (CVA), gastroesophageal reflux cough

Bronchiectasis, pulmonary tumors, and others

Recommendation: Anyone with a prolonged cough should first undergo chest imaging (X-ray/CT) and routine blood tests at a qualified medical facility. Once the cause is clarified, TCM regulation may follow. Do not self-diagnose based on symptoms alone.

⚠️ Disclaimer

This case is presented for TCM academic exchange only. Herbs require individualized pattern differentiation—do NOT copy this formula for self-medication.

TCM emphasizes "one person, one formula." The same presentation of cough with profuse phlegm may arise from entirely different patterns of cold/heat and deficiency/excess. This case is phlegm-heat; a cold-phlegm pattern would require warming transformation, and misusing cold herbs here would only prolong the condition.

Please consult a qualified TCM practitioner for in-person diagnosis before using any herbal formula.