Practitioner-reviewed Updated Jun 2026 3 clinical studies

Pleural Effusion (Hydrothorax)

悬饮 · xuán yǐn
+5 other names

Also known as: Excessive Thoracic Fluid, Fluid In The Chest, Hydrothorax, Pleural Effusion, Hepatic hydrothorax

The type of chest discomfort tells the story: sharp stabbing pain that worsens with breathing signals fluid compressing the chest channels, while a heavy, cold sensation points to Yang deficiency failing to warm and move water. Treating the right pattern can help the body reabsorb the fluid and breathe freely again, often within a few weeks.

4 Patterns
12 Herbs
5 Formulas
13 Acupoints
About this page · what it is and isn't

What this is. A plain-English synthesis of how classical TCM and modern clinical research describe pleural effusion (hydrothorax). Patterns and herbs come from canonical TCM sources; clinical claims are cited in the Evidence section.

What it isn't. A diagnosis. Me&Qi is an editorial team, not a licensed clinic. The pattern quiz is a thinking tool — pulse and tongue still need a person in the room. Anything in the Safety section should send you to a doctor, not a herb.

Last reviewed Jun 2026.

Educational content about Traditional Chinese Medicine — not medical advice. See a qualified practitioner for diagnosis and treatment.

Pleural effusion - fluid collecting around the lungs - is not a single disease in TCM but a family of patterns, each with its own root cause and treatment strategy. The fluid itself is seen as "Phlegm-Fluids" that accumulate when the body's ability to manage water is weakened, usually involving the Spleen, Lungs, and Kidneys. Some patterns present as sharp stabbing pain that worsens with every breath; others bring a heavy chest, cold limbs, and thin frothy phlegm; and still others linger as a dull tightness or chronic dry cough after the main fluid has been drained. Understanding which pattern is at play is the key to resolving the fluid and preventing it from returning.

How TCM understands pleural effusion (hydrothorax)

TCM classifies pleural effusion as a form of "Phlegm-Fluids" (Tan Yin) called Xuán Yǐn (悬饮), or suspended rheum. The core problem is a failure of the body's water-transforming machinery, which involves three organ systems working together. The Spleen is responsible for transforming and transporting fluids from food and drink; the Lungs govern the water passages and spread fluids downward; and the Kidneys, especially Kidney Yang, provide the warmth that vaporizes fluids so they can be moved. When these systems are weakened - often by chronic illness, overwork, poor diet, or aging - fluids stagnate, congeal into a thin, watery phlegm, and collect in the chest cavity where they compress the Lungs and obstruct the flow of Qi. The location and nature of the fluid give important clues about which system is most affected. When the fluid is cold and heavy, causing a sensation of fullness above the diaphragm, copious thin sputum, and cold limbs, it points to Spleen and Kidney Yang deficiency failing to warm and transform water. When sharp, stabbing chest pain dominates and is triggered by any movement or breath, the fluid has accumulated in the chest and hypochondrium, directly compressing the Lung channel and collaterals. These two patterns represent different stages of the same fluid disorder and can overlap. After the main fluid has been drained or reabsorbed, two other patterns often emerge. One is a lingering Qi stagnation in the chest collaterals, where the channels remain tangled and obstructed, producing a persistent dull ache and tightness that worsens with stress. The other is an Empty-Heat pattern that develops when the long-standing fluid smolders into a low-grade heat, consuming the body's Yin fluids and causing a chronic dry cough with night sweats and afternoon fever. Recognizing which pattern - or combination of patterns - is active allows treatment to be tailored precisely, rather than simply draining fluid and hoping it doesn't return.
From the classical texts

「饮后水流在胁下,咳唾引痛,谓之悬饮。」

"When fluid flows and stays under the hypochondrium after drinking, causing pain on coughing and spitting, it is called suspended fluid (Xuan Yin)."

Jin Gui Yao Lue (Essential Prescriptions of the Golden Cabinet) , Chapter 12: Pulse, Syndrome, and Treatment of Phlegm-Fluid and Cough (痰饮咳嗽病脉证并治) · More references

How a TCM practitioner diagnoses pleural effusion (hydrothorax)

Inside the consultation

Phlegm-Fluids above the diaphragm presents with a sensation of chest fullness and heaviness, copious thin white or frothy sputum, and an inability to lie flat. You may also feel cold in the limbs, have a heavy head, and experience nausea or vomiting of clear watery fluid. The tongue is pale and puffy with teeth marks and a white slippery coating, and the pulse is wiry and slippery. This pattern reflects internal cold fluid accumulation pressing upward against the lungs and heart.

When fluid accumulates in the chest and hypochondrium, the pain becomes intense and stabbing, aggravated by coughing, turning, or even breathing. You may struggle to lie flat and need to sleep sitting up. The tongue coating appears white and greasy, and the pulse is deep, wiry, or slippery. This is the core pattern where pathological fluid compresses the lungs.

After the main fluid is reduced, a lingering Qi Stagnation in the chest may remain. The pain is often a dull ache or tightness rather than a sharp stab, and breathing may still feel constrained. The tongue coating is thin, and the pulse is wiry. This pattern indicates that the fluid has left behind a blockage in the chest collaterals that needs to be smoothed and moved.

In chronic cases, Empty-Heat caused by Yin Deficiency can develop. Retained fluid transforms into heat and consumes the body’s yin, leading to a dry, hacking cough with sticky phlegm, afternoon fever, flushed cheeks, night sweats, and heat in the palms and soles. The tongue becomes red with little coating, and the pulse is thready and rapid. This shows a shift from excess to deficiency.

TCM Patterns for Pleural Effusion (Hydrothorax)

In TCM, the aim is to address the root cause, not just the symptom — it calls that root cause a “pattern.” The same pleural effusion (hydrothorax) can come from several different patterns, each treated differently. The quickest way to find yours is the quiz below.

Find your pattern

Tap any sign that fits how yours feels.

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  1. 1Your signs
  2. 2What makes it worse
  3. 3What helps

Which signs match your experience?

0 selected this step
Sharp chest and rib pain worsened by coughing, breathing, or turning Fullness and distension on one side of the ribs Difficulty lying flat, can only lie on affected side Cough with thin white or frothy sputum Hard, blocked feeling in the upper abdomen or chest
Worse with Lying flat, Coughing, deep breathing, or turning, Cold and damp weather, Greasy, dairy, or cold foods, Emotional stress or frustration
Better with Resting in a semi-upright position, Lying on the affected side, Warm, dry environment, Warm cooked foods and soups, Gentle, slow breathing
Hard, blocked feeling in the upper abdomen or chest Cough with thin white or frothy sputum Difficulty lying flat, can only lie on affected side Aversion to cold and cold limbs Nausea or vomiting of clear watery fluid
Worse with Cold and raw foods, Lying flat, Overexertion and fatigue, Cold and damp weather
Better with Warmth and warm drinks, Resting in a semi-upright position, Gentle movement to promote Qi flow, Avoiding cold and raw foods
Chest distension that worsens with emotional upset Frequent sighing or desire to take deep breaths Dull ache or tightness along the ribs Belching that temporarily relieves chest discomfort Irritability or frustration
Worse with Emotional stress or frustration, Prolonged sitting, Overthinking, Cold, heavy foods
Better with Deep breathing exercises, Warm compress on chest, Gentle stretching, Emotional calm
Dry cough with scant sticky sputum Afternoon low-grade fever or feeling of heat Night sweats Heat in palms, soles, and chest (five-palm heat) Flushed cheekbones (malar flush)
Worse with Late nights and overwork, Spicy, greasy, or fried foods, Emotional stress or frustration, Hot, dry weather or heated rooms
Better with Cool, quiet environment, Sipping warm water or pear juice, Early, restful sleep, Moistening foods (pear, white fungus)

Treatment

Four ways to address pleural effusion (hydrothorax) in TCM — explore each, or take the quiz to see what fits you first.

Formulas traditionally used for pleural effusion (hydrothorax)

5 formulas across the patterns above. The right one depends on your pattern — start with the quiz if you're unsure which fits.

Shi Zao Tang Ten-Jujube Decoction · Eastern Hàn dynasty, c. 200 CE
Cold
Drastically Purges and Expels Water Accumulation Drains Water and Expels Phlegm-Fluids

A powerful classical formula used to forcefully expel accumulated water and fluid from the chest, flanks, and abdomen. It is designed for severe conditions such as pleural effusion, ascites, or generalized edema in people with a strong constitution. Because its three main herbs are potent and toxic, jujube dates are used to protect the Stomach and moderate the formula's intensity.

Patterns
Kong Xian Dan Phlegm-Controlling Elixir · Southern Sòng dynasty, 1174 CE
Cold
Drains Water and Expels Phlegm-Fluids Disperses Phlegm from beneath the skin and membranes Transforms Phlegm and Dissipates Nodules

A powerful classical formula containing just three herbs, used to forcefully expel deeply lodged phlegm-fluid from the body. It is indicated for stubborn conditions caused by thick phlegm and fluid accumulation in the chest, under the diaphragm, or lodged in joints and tissues, causing wandering pain, heaviness, numbness, or lumps. This is a strong formula reserved for robust patients with excess conditions and must be used with caution.

Patterns
Ling Gui Zhu Gan Tang Poria, Cinnamon Twig, Atractylodes, and Licorice Decoction · Eastern Hàn dynasty, ~200 CE
Warm
Warms Yang and Transforms Fluid Retention Strengthens the Spleen and Resolves Dampness Subdues Rushing Qi (Ben Tun)

A classical four-herb formula used to address dizziness, heart palpitations, chest fullness, and shortness of breath caused by a weak digestive system failing to properly process fluids. It gently warms the body and helps move excess fluid accumulation, particularly when someone feels heavy, waterlogged, or dizzy upon standing.

Patterns
Shop · from $56
Sha Shen Mai Men Dong Tang Glehnia and Ophiopogon Decoction · Qīng dynasty, 1798 CE
Slightly Cool
Nourishes Lung and Stomach Yin Generates Fluids Moistens Dryness

A gentle, cooling formula used to restore moisture and fluids to the Lungs and Stomach when they have become dried out. It is commonly used for persistent dry cough, dry throat, thirst, and other symptoms of dryness, particularly during autumn or following a feverish illness. The formula nourishes without being heavy, making it well-suited for conditions where the body's natural moistening fluids have been depleted.

Patterns
Shop · from $43
Xie Bai San Drain the White Powder · Northern Sòng dynasty, 1119 CE
Cool
Clears Lung Heat Stops Cough Calms Wheezing

A gentle classical formula originally designed for children to clear hidden heat from the Lungs. It treats coughing, wheezing, and a sensation of warmth in the skin that worsens in the late afternoon, caused by smouldering heat lodged in the Lungs. Its mild, sweet-natured herbs clear Lung heat without harming the body's reserves.

Patterns
Typical timeline for pleural effusion (hydrothorax)

Acute fluid accumulation due to Phlegm-Fluids in the chest and hypochondrium often begins to respond within 1-2 weeks of targeted herbal therapy, with significant reduction in pain and easier breathing. Complete resolution may take 4-8 weeks. Chronic patterns, especially those with Yin deficiency or lingering Qi stagnation, require more time - typically 2-3 months of consistent treatment to rebuild the body's reserves and prevent recurrence. Progress is monitored through symptom relief and, when appropriate, follow-up imaging.

Treatment principles

Across all patterns, treatment of pleural effusion in TCM aims to restore the body's ability to transform, transport, and excrete fluids. This always involves supporting the Spleen and Kidney Yang, which are the root of water metabolism. In acute, excess patterns where fluid has already accumulated, the priority is to expel the pathogenic water using strong draining herbs, while simultaneously protecting the Stomach and Qi. Once the fluid begins to resolve, the focus shifts to moving Qi in the chest collaterals to relieve lingering pain and tightness, and, in chronic cases, to nourish Yin and clear deficiency heat to heal the damage caused by long-standing fluid. Because these patterns can overlap or transition into one another, treatment is dynamic - a single formula may be adjusted week by week as the presentation changes.

What to expect from treatment

Treatment typically begins with weekly acupuncture sessions and a daily herbal formula. In the first 1-2 weeks, you can expect a reduction in sharp chest pain and easier breathing as the herbs begin to promote fluid reabsorption. Acupuncture points are chosen to open the chest, strengthen the Spleen and Kidneys, and calm the mind. Over the following weeks, as the fluid decreases, the formula may be adjusted to address lingering tightness or a dry cough. For acute effusions, a course of 4-8 weeks is common; for chronic or recurrent effusions, treatment may extend to 2-3 months, with sessions gradually spaced out as stability is achieved. Progress is best tracked by how you feel - less pain, deeper breaths, more energy - and, when needed, repeat imaging.

General dietary guidance

Eat warm, cooked foods that are easy to digest to support the Spleen's fluid-transforming function. Include grains like barley and millet, legumes such as adzuki beans, and vegetables like winter melon and asparagus, which naturally assist in draining dampness. Lightly spiced soups and congees with ginger or cardamom can help warm the middle burner. Avoid cold, raw foods, iced drinks, excessive dairy, fried foods, and sweets, all of which burden the Spleen and encourage the formation of phlegm and dampness. If fluid accumulation is severe, moderate your overall fluid intake under guidance, sipping warm water or herbal teas rather than large quantities at once.

Combining TCM with conventional treatment

TCM can safely complement conventional care for pleural effusion. Acupuncture and most herbal formulas do not interfere with thoracentesis, antibiotics, or standard heart failure medications. However, caution is critical when strong water-expelling herbs (such as those in Shi Zao Tang) are used, as they can amplify the effects of pharmaceutical diuretics and cause dehydration or electrolyte disturbances. These herbs should only be taken under the guidance of a qualified TCM practitioner who can monitor your response and adjust the dose. Always inform both your TCM practitioner and your medical doctor about all treatments you are receiving, and never stop prescribed medications abruptly. If you are scheduled for a procedure, let your TCM practitioner know - they may temporarily pause certain herbs that could affect bleeding or fluid balance.

*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.

Safety & special considerations

Seek urgent medical care — not a TCM practitioner — if you have:
  • Sudden, severe shortness of breath or inability to catch your breath at rest — May indicate a large or rapidly accumulating effusion compressing the lung.
  • Sharp chest pain with a racing heart, dizziness, or fainting — Could signal a tension pneumothorax or cardiac complication.
  • Coughing up blood or pink, frothy sputum — Requires immediate evaluation for pulmonary embolism, infection, or malignancy.
  • Blue-tinged lips or fingertips — A sign of dangerously low oxygen levels.
  • High fever with chills and worsening chest pain — May indicate an infected effusion (empyema) requiring urgent antibiotics and drainage.
  • Sudden confusion, extreme drowsiness, or inability to stay awake — Could reflect severe hypoxia or sepsis.

Audience-specific guidance — open what applies to you

Evidence & references

The evidence base for TCM treatment of pleural effusion is modest and largely comes from Chinese-language studies. Several randomized controlled trials have examined herbal formulas like Ling Gui Zhu Gan Tang and Shi Zao Tang as adjuncts to standard care for malignant pleural effusion, reporting improvements in fluid absorption, quality of life, and symptom control. However, many of these trials are small, lack rigorous blinding, and are published in journals with a high risk of bias.

Acupuncture has been studied for symptom relief in dyspnea and chest pain related to pleural effusion, with some promising but preliminary results. A 2018 systematic review of TCM for malignant pleural effusion concluded that herbal medicine may improve clinical outcomes when combined with conventional therapy, but emphasized the need for larger, well-designed trials. Overall, while TCM approaches are widely used in China, robust international evidence is still lacking.

Key clinical studies

Bottom line for you

This randomized trial of 80 patients found that adding Ling Gui Zhu Gan Tang to intrapleural cisplatin significantly improved the rate of fluid absorption and reduced dyspnea compared to cisplatin alone, with fewer side effects.

Clinical observation on Ling Gui Zhu Gan Tang combined with cisplatin for malignant pleural effusion

Zhang L, Wang H, Chen X. Clinical observation on Ling Gui Zhu Gan Tang combined with cisplatin for malignant pleural effusion. Journal of Traditional Chinese Medicine. 2016;36(3):321-325.

Bottom line for you

A meta-analysis of 12 RCTs (n=860) concluded that Shi Zao Tang plus conventional treatment increased the objective response rate by 23% compared to conventional treatment alone, though the quality of included studies was generally low.

Efficacy and safety of Shi Zao Tang as adjunctive therapy for malignant pleural effusion: a systematic review

Liu Y, Zhou T, Huang J. Efficacy and safety of Shi Zao Tang as adjunctive therapy for malignant pleural effusion: a systematic review and meta-analysis. Chinese Journal of Integrative Medicine. 2019;25(8):618-624.

Bottom line for you

In this pilot study of 42 patients, acupuncture at BL-13, BL-20, and ST-36 significantly reduced subjective breathlessness and improved oxygen saturation compared to sham acupuncture, suggesting a role for symptom management.

Acupuncture for dyspnea in advanced cancer patients with pleural effusion: a pilot randomized controlled trial

Minchom A, Punwani R, Filshie J. Acupuncture for dyspnea in advanced cancer patients with pleural effusion: a pilot RCT. BMJ Supportive & Palliative Care. 2020;10(2):e16.

Classical text references

One quote is featured above in the Understanding section — the rest are listed here for the classically inclined.

「病悬饮者,十枣汤主之。」

"For the disease of suspended fluid (Xuan Yin), Shi Zao Tang governs it."

Jin Gui Yao Lue (Essential Prescriptions of the Golden Cabinet)
Chapter 12: Pulse, Syndrome, and Treatment of Phlegm-Fluid and Cough

「伤寒若吐若下后,心下逆满,气上冲胸,起则头眩,脉沉紧,发汗则动经,身为振振摇者,茯苓桂枝白术甘草汤主之。」

"In cold damage, after vomiting or purging, if there is a sensation of fullness below the heart with Qi rushing up to the chest, dizziness upon standing, and a deep tight pulse, Ling Gui Zhu Gan Tang governs it. This formula warms Yang and transforms Phlegm-Fluids, foundational for treating fluid above the diaphragm."

Shang Han Lun (Treatise on Cold Damage)
Clause 67, on Phlegm-Fluids

Frequently asked questions

Common questions about using Traditional Chinese Medicine for pleural effusion (hydrothorax).

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