Dampness-Draining Formulas

萆薢滲濕湯 · Bì Xiè Shèn Shī Tāng

Bi Xie Shen Shi Tang

A classical formula for damp-heat pouring downward with eczema, itching and turbid urine.

View formula profile →
Last reviewed August 2026
Formula CategoryDampness-Draining Formulas
Primary PatternDamp-Heat
Primary FunctionClear heat, drain damp, resolve turbidity
Primary Therapeutic PrincipleDrain damp-heat from the lower jiao and skin
Main HerbsFish-Poison Yam Rhizome · Coix Seed / Job's Tears · Phellodendron Bark · Red Poria · Moutan Bark / Tree Peony Bark · Alisma Rhizome · Talcum · Tetrapanax Pith
Classical SourceClassical TCM formulary

Why This Formula?

Traditionally selected for damp-heat pouring downward with skin eczema and turbid urine, rather than lower-limb bi alone, Liver damp-heat, or wind-type skin itch.

Traditionally selected for damp-heat pouring downward with skin eczema and turbid urine, rather than lower-limb bi alone, Liver damp-heat, or wind-type skin itch.

What Is Bi Xie Shen Shi Tang?

1. Formula Background & Records

Bi Xie Shen Shi Tang (萆薢渗湿汤), or Tokoro Decoction to Drain Dampness, is a classical Qing-dynasty formula from Gao Bingjun’s Yang Ke Xin De Ji (Collected Experiences in Sore and Ulcer Medicine). It belongs to the category of formulas that clear Damp-Heat from the Lower Burner and drain turbidity through the urine.

This formula addresses Damp-Heat pouring downward into the skin and channels of the lower body, a common pattern of weeping eczema, lower-leg ulcers (lian chuang), and hot swollen legs. Typical signs include red, oozing, or itchy eruptions on the lower limbs, heavy aching legs, dark scanty urine, a red tongue with yellow greasy coating, and a slippery rapid pulse. Combining Bi Xie as the chief herb to separate the clear from the turbid and drain Dampness, Yi Yi Ren, Ze Xie, Chi Fu Ling, Hua Shi, and Tong Cao to leach Damp-Heat through urination, Huang Bai to dry Damp-Heat in the Lower Jiao, and Mu Dan Pi to cool and invigorate Blood so Heat does not scorch the skin, Bi Xie Shen Shi Tang guides downward Damp-Heat out through the urine and is distinct from Bi Xie Fen Qing Yin, which treats cloudy urine from deficiency rather than excess Damp-Heat sores.

Bi Xie Shen Shi Tang

2. Clinical Applications in Dermatology

Bi Xie Shen Shi Tang (Dioscorea Decoction to Percolate Dampness) is frequently used for skin conditions driven by trapped damp-heat:

  • Acute Eczema: If a patient presents with red, flushed rashes, dense blisters, severe itching, and weeping sores—often accompanied by dry stools, dark urine, and a red tongue with a yellow, greasy coating—this formula is a go-to choice. Generally, after a short course (3 to 5 doses), patients often see reduced weeping, eased itching, and fading rashes.
  • Seborrheic Dermatitis: For symptoms like a highly greasy scalp, itchiness, redness, and flaking skin, this formula helps regulate sebum (oil) production and calm the skin by clearing out the underlying damp-heat.

3. Clinical Applications in Urology

Because the formula excels at clearing the lower body, it is highly effective for urinary tract issues:

  • Acute Cystitis (Bladder Inflammation): Commonly used when a patient experiences frequent, urgent, burning, or painful urination. Other signs might include a bitter taste in the mouth, dry mouth, and a rapid pulse. The formula helps flush out the irritation and restore normal urination.
  • Urethritis: For patients with sharp, burning pain in the urethra, localized redness and swelling, or slight discharge, this formula works by cooling the heat, draining the dampness, and effectively clearing the local inflammation.
Bi Xie Shen Shi Tang

4. Clinical Applications in Other Diseases

Trapped damp-heat can settle in other areas of the lower body, and this formula can be adapted to help:

  • Joint Pain: When damp-heat pours downward into the lower limbs, it can cause swollen, painful, and stiff joints. The formula helps by clearing the heat, draining the fluid buildup, and unblocking the energy channels (meridians) to relieve pain.
  • Scrotal Eczema: For localized symptoms like severe itching, dampness, redness, and swelling in the scrotal area, using this formula can effectively dry the dampness, calm the irritation, and promote healing of the delicate skin.

Herb Composition (Sovereign / Minister / Assistant / Envoy)

1. King Ingredient - Bi Xie (Dioscorea Rhizome)

Bi Xie (Dioscorea Rhizome) is the dried rhizome of specific plants in the Dioscoreaceae family.

  • Properties: It has a bitter and neutral nature, entering the kidney and stomach meridians.
  • Role in the Formula: It acts as the "king" (primary) herb in Bi Xie Shen Shi Tang. Its main job is to promote urination to flush out "turbidity" (cloudy dampness) and relieve pain. By directly targeting the damp-heat pathogens in the lower jiao (lower body), it helps the body excrete these pathogens through urine, making it the core ingredient of this formula.

2. Minister Ingredient - Yi Yi Ren (Coix Seed)

Yi Yi Ren (Coix Seed) is a sweet, bland, and cooling herb that enters the spleen, stomach, and lung meridians.

  • Properties: It is excellent for draining dampness, strengthening the spleen, relieving pain, and clearing heat.
  • Role in the Formula: As the "minister" herb, it assists Bi Xie in flushing out dampness. More importantly, it strengthens the spleen—the organ responsible for fluid metabolism in TCM—to stop dampness from forming in the first place. Together, they effectively treat lower-body damp-heat.

3. Assistant Ingredients - Huang Bo (Phellodendron Bark), Chi Fu Ling (Red Poria), Mu Dan Pi (Moutan Bark)

These three herbs work together to assist the main ingredients and tackle specific symptoms:

  • Huang Bo (Phellodendron Bark): This bitter and cold herb enters the kidney and bladder meridians. It is highly effective at clearing heat and drying dampness, especially in the lower body. It boosts the formula's overall cooling and fluid-draining power.
  • Chi Fu Ling (Red Poria): Sweet, bland, and neutral, it enters the heart, spleen, and bladder meridians. It focuses on gently draining damp-heat through urination, helping the primary herbs efficiently flush pathogens out of the body.
  • Mu Dan Pi (Moutan Bark): Bitter, pungent, and slightly cold, it enters the heart, liver, and kidney meridians. It cools the blood and promotes blood circulation, preventing trapped damp-heat from "burning" the blood. Its circulation-boosting effects also help heal local tissues affected by the damp-heat.
Bi Xie Shen Shi Tang

4. Guide Ingredients - Hua Shi (Talcum), Tong Cao (Tetrapanax Medulla)

Guide herbs direct the medicine to the right place in the body:

  • Hua Shi (Talcum): Sweet, bland, and cold, this heavy mineral enters the bladder, lung, and stomach meridians. Because of its heavy nature, it acts as an anchor, guiding the effects of all the other herbs downward directly into the lower jiao (lower body). It also clears heat and promotes urination.
  • Tong Cao (Tetrapanax Medulla): Sweet, bland, and slightly cold, it enters the lung and stomach meridians. It opens up the water pathways to promote urination. Paired with Hua Shi, it enhances the formula's ability to drain damp-heat downward and out of the body.

Clinical Presentation in TCM

1. Pathogenesis Analysis

Bi Xie Shen Shi Tang is designed to treat an accumulation of damp-heat in the lower jiao (which includes organs like the kidneys, bladder, and intestines).

  • When damp-heat attacks this area, it can disrupt bladder function, leading to frequent, painful, or dark urination.
  • If it gets trapped in the skin, it can cause itching, redness, and blisters.
  • If it sinks further down, it can affect the reproductive system, causing issues like scrotal eczema or abnormal vaginal discharge. This condition is usually triggered by external damp-heat weather, a poor diet, or a weakened spleen that fails to process fluids properly.

2. Efficacy Description

The main goal of this formula is to clear heat and promote urination to drain dampness. Thanks to the teamwork of its ingredients, it effectively clears the lower body of damp-heat pathogens.

  • Bi Xie flushes out turbidity.
  • Yi Yi Ren drains dampness and supports the spleen.
  • Huang Bo dries dampness and cools heat.
  • Chi Fu Ling aids in urination.
  • Mu Dan Pi cools the blood.
  • Hua Shi and Tong Cao open the water pathways. Together, they resolve the root cause of lower-body damp-heat.
Bi Xie Shen Shi Tang

3. Indicated Diseases

In modern clinical practice, this formula is commonly used for:

  • Dermatological Issues: Such as acute eczema and seborrheic dermatitis. Symptoms include itchy skin, red rashes, blisters, or weeping sores, often accompanied by a red tongue with a yellow, greasy coating. The formula cools the heat and drains the dampness trapped in the skin to relieve these symptoms.
  • Urological Issues: Such as acute cystitis (bladder inflammation) and urethritis. Symptoms include frequent, urgent, or painful urination, dark urine, and sometimes a fever. By clearing heat and promoting urination, the formula helps restore normal bladder function.
  • Other Conditions: It can also relieve swelling and pain in the lower joints caused by damp-heat, as well as conditions like scrotal eczema, by directing the trapped pathogens down and out of the body.

The Mechanism in Classical Theory

1. Promote Diuresis as Main Line

The core strategy of this entire formula is to promote urination. In Traditional Chinese Medicine (TCM), there is a famous saying: "To treat dampness, you must first promote urination."

  • Targeting the Root: Bi Xie (Dioscorea Rhizome) takes the lead as the "king" herb. It specializes in separating the "clear" fluids from the "turbid" (cloudy) ones, making it the top choice for clearing damp-heat in the lower body.
  • Teamwork for Drainage: Yi Yi Ren (Coix Seed) acts as the perfect assistant, enhancing the body's ability to drain dampness.
  • Opening the Pathways: Herbs like Chi Fu Ling (Red Poria), Hua Shi (Talcum), and Tong Cao (Tetrapanax Medulla) further open up the body's water channels, ensuring that the damp pathogens have a clear exit route out of the body through urine.

2. Synergistic Heat-Clearing

Dampness often teams up with heat. If dampness sits in the body for too long, it can "brew" and create even more heat.

  • Cooling the Lower Body: Huang Bo (Phellodendron Bark) is a bitter, cold herb that is highly effective at clearing this specific type of trapped lower-body damp-heat.
  • Protecting the Blood: Mu Dan Pi (Moutan Bark) cools the blood. This is a crucial step because it stops the heat from sinking deeper into the bloodstream and causing more severe issues. By combining diuretic (water-draining) herbs with heat-clearing herbs, the formula tackles both the surface symptoms and the underlying root cause.
Bi Xie Shen Shi Tang

3. Assist in Strengthening Spleen

In TCM, the spleen and stomach are the command centers for digesting food and managing fluid transport. If the spleen is weak, fluids build up and turn into "dampness."

  • Fixing the Source: Yi Yi Ren (Coix Seed) does double duty. It doesn't just drain existing dampness; it also actively strengthens the spleen.
  • Long-term Recovery: By boosting the spleen's function, the formula cuts off the production of new dampness at its source. This holistic approach not only helps clear the current illness but also strengthens the body's overall natural defenses.

Clinical Comparison Table

Compare Bi Xie Shen Shi TangSi Miao SanLong Dan Xie Gan TangXiao Feng San
Primary Function Clear heat, drain damp, resolve turbidityClear heat, dry damp, ease bi pain in the lower bodyClear Liver Fire, drain Damp-HeatDispel wind, nourish blood, clear heat, dry damp
Formula Category Dampness-Draining FormulasDampness-Draining FormulasHeat-Clearing FormulasWind-Damp Dispelling Formulas
Typical TCM Pattern Damp-HeatDamp-HeatLiver FireDamp-Heat
Main Conditions Frequent UrinationJoint Discomfort, Low Back Pain, Numbness in LimbsBitter Taste in Mouth, Liver Qi Stagnation, Damp-Heat Constitution
Main Herbs Fish-Poison Yam Rhizome · Coix Seed / Job's Tears · Phellodendron Bark · Red Poria · Moutan Bark / Tree Peony Bark · Alisma Rhizome · Talcum · Tetrapanax PithPhellodendron Bark · Coix Seed / Job's Tears · Atractylodes Rhizome · Achyranthes RootGentian Root · Scutellaria / Baikal Skullcap · Gardenia Fruit · Alisma Rhizome · Akebia Stem · Plantago Seed · Chinese Angelica Root · Raw Rehmannia Root · Bupleurum Root · Licorice RootSchizonepeta / Japanese Catnip · Saposhnikovia Root · Burdock Seed / Arctium Fruit · Cicada Moulting · Atractylodes Rhizome · Sophora Root · Akebia Stem · Gypsum · Anemarrhena Rhizome · Raw Rehmannia Root · Chinese Angelica Root · Licorice Root
Classical Source Classical TCM formularyClassical TCM formularyYi Fang Ji Jie (Analytic Collection of Medical Formulas, Wang Ang, Qing dynasty)Ming-Qing classical formulary

How to tell them apart

Bi Xie Shen Shi Tang, Si Miao San, Long Dan Xie Gan Tang and Xiao Feng San address damp-heat in the lower jiao or skin. Si Miao San is compact lower-limb damp-heat bi; Long Dan Xie Gan clears Liver damp-heat; Xiao Feng San dispels wind for skin itch. Bi Xie Shen Shi Tang drains damp-heat for eczema, itching and turbid urine from damp-heat pouring downward.

For educational reference only, based on traditional pattern differentiation — not a substitute for professional advice.

Clinical Modifications for Bi Xie Shen Shi Tang

In clinical practice, a TCM practitioner will often customize Bi Xie Shen Shi Tang (Dioscorea Decoction to Percolate Dampness) based on the patient's specific presentation. Here are some common modifications:

1. Those with heavy damp-heat

If the patient's damp-heat symptoms are particularly severe, the practitioner needs to boost the formula's ability to clear heat and promote urination.

  • Herb Additions: Herbs like Ku Shen (Sophora Root) and Tu Fu Ling (Glabrous Greenbrier Rhizome) are often added.
  • Why it works: Ku Shen is bitter and cold, making it excellent for drying dampness and clearing heat in the lower jiao (lower body), as well as relieving skin issues. Tu Fu Ling is gentle but highly effective at detoxifying and clearing damp-heat from the joints and skin. Together with the base formula, they provide a much stronger defense against stubborn damp-heat.

2. Those with severe itching

For skin conditions where intense, unbearable itching is the primary complaint, the formula needs extra help to calm the skin.

  • Herb Additions: Bai Xian Pi (Dictamnus Root Bark) and Di Fu Zi (Kochia Fruit) are commonly included.
  • Why it works: Bai Xian Pi clears heat, dries dampness, and specifically detoxifies to relieve itching. Di Fu Zi excels at clearing heat and "dispelling wind" (which in TCM is often the root cause of sudden, severe itching). Combining these two significantly upgrades the formula's anti-itch properties.
Bi Xie Shen Shi Tang

3. Those with obvious heat-toxin

If the damp-heat has escalated into a "heat-toxin"—showing up as severe localized redness, swelling, burning pain, or even a systemic fever—the cooling power must be maximized.

  • Herb Additions: Jin Yin Hua (Honeysuckle Flower) and Lian Qiao (Forsythia Fruit) are added to the mix.
  • Why it works: Both of these are superstar herbs in TCM for clearing heat and detoxifying. They rapidly cool down inflammation and neutralize toxins, working perfectly alongside the main formula to treat aggressive, hot infections in the lower body.

What the Science Suggests

Modern science has taken a closer look at the ingredients in Bi Xie Shen Shi Tang, and studies have found that these traditional herbs possess a variety of measurable pharmacological effects.

1. Pharmacological Action Research

  • Bi Xie (Dioscorea Rhizome): Research shows it has anti-inflammatory, anti-arthritic, and anti-allergic properties. Its active compounds likely work by regulating the immune system and stopping the body from releasing inflammatory chemicals.
  • Yi Yi Ren (Coix Seed): Known for immune regulation and lipid-lowering effects. The polysaccharides in the seed are believed to play a key role in these benefits.
  • Huang Bo (Phellodendron Bark): Highly regarded for its antibacterial, anti-inflammatory, and fever-reducing effects, primarily due to active alkaloids like berberine.
  • Chi Fu Ling (Red Poria): Studies confirm its diuretic properties (promoting urination) and its ability to gently boost immune function.
  • Mu Dan Pi (Moutan Bark): Exhibits anti-inflammatory, antibacterial, and anti-allergic effects, largely thanks to its phenolic compounds.
  • Hua Shi (Talcum) and Tong Cao (Tetrapanax Medulla): Both have demonstrated mild diuretic effects, confirming their traditional use in promoting fluid drainage.
Bi Xie Shen Shi Tang

2. Clinical Efficacy Verification

Numerous clinical trials and observations have backed up the effectiveness of this formula:

  • Dermatology: When used alongside topical Western medicines for conditions like eczema and seborrheic dermatitis, the combination often leads to better overall healing, lower recurrence rates, and fewer side effects compared to using Western medications alone.
  • Urology: For treating acute cystitis (bladder inflammation) and urethritis, combining this formula with standard antibiotics can enhance the overall treatment effect, helping patients recover and relieve symptoms faster.
  • Overall Quality of Life: Across various conditions related to damp-heat, continuous studies show that customizing this formula helps significantly improve patients' daily comfort and overall quality of life, providing strong scientific backing for its widespread use in modern clinics.

Safety Considerations

1. Dietary and Constitutional Precautions

While taking Bixie Shenshi Decoction, avoid spicy, greasy, stimulating foods and alcohol, as they may worsen damp-heat symptoms and burden the spleen and stomach. People with a deficiency-cold constitution should use it cautiously because its bitter-cold, diuretic ingredients may cause abdominal pain, diarrhea, or increased sensitivity to cold.

2. Pregnancy and Condition Monitoring

Pregnant women should consult a physician before using Bixie Shenshi Decoction. Monitor symptoms and stop self-treatment if the condition fails to improve or worsens. Seek medical advice promptly if nausea, vomiting, rash, or other adverse reactions occur.

Questions About Bi Xie Shen Shi Tang

Q1: What are the actions of Bi Xie Shen Shi Tang?
Bi Xie Shen Shi Tang has the actions of clearing Heat, leaching Dampness, separating the clear from the turbid, and cooling the Blood. From Yang Ke Xin De Ji, it guides Lower Jiao Damp-Heat out through the urine and is often used for weeping lower-body skin as well as turbid discharge.
Q2: Which modern conditions is Bi Xie Shen Shi Tang suited to?
Modern TCM clinical practice commonly applies it to individuals whose pattern differentiation falls within Damp-Heat pouring downward, including lower-leg eczema or ulcers of Damp-Heat type, yellow foul leukorrhea, cloudy or burning urine of this pattern, and some erysipelas or gouty swelling of the lower limbs after medical causes have been assessed.
Q3: Is Bi Xie Shen Shi Tang suitable for weeping, itchy lower-leg skin and yellow discharge?
For presentations of oozing or itchy eczema on the lower legs, heavy aching feet, yellow leukorrhea or cloudy urine, a yellow greasy coating, and a slippery rapid pulse — in those whose pattern differentiation confirms Lower Jiao Damp-Heat — TCM commonly applies this formula as an adjunct. Spreading redness with fever needs medical evaluation of infection.
Q4: Who should not take Bi Xie Shen Shi Tang?
Those with Spleen-Yang deficiency Cold, watery swelling without Heat, or Yin-deficiency dryness without Damp-Heat are generally not suitable. The formula is bitter, cold, and leaching. Use should be assessed by a qualified TCM physician.
Q5: Why is Bi Xie the chief herb?
Bi Xie separates the clear from the turbid and drains Lower Jiao Dampness from both the urine and the skin. Yi Yi Ren and Chi Fu Ling assist leaching and support the Spleen. Huang Bai dries Damp-Heat. Ze Xie, Hua Shi, and Tong Cao give the Heat-Damp a urinary exit. Mu Dan Pi cools and gently moves Blood so stagnant Heat in the skin and vessels can leave. The strategy is to drain downward rather than dry the surface alone.
Q6: How does Bi Xie Shen Shi Tang differ from Si Miao San or Ba Zheng San?
Si Miao San more strongly treats hot heavy Damp-Heat Bi of the knees and feet. Ba Zheng San more fiercely promotes urination for acute Heat lin with burning, dark, painful urine. Bi Xie Shen Shi Tang is chosen when Damp-Heat pours downward into the skin of the legs or into turbid discharge, and Bi Xie’s “separate clear from turbid” action is the core.
Q7: What are the main ingredients of Bi Xie Shen Shi Tang?
The Yang Ke Xin De Ji formula consists of Bi Xie to drain turbid Dampness; Yi Yi Ren and Chi Fu Ling to leach Dampness and support the Spleen; Huang Bai to clear Lower Jiao Damp-Heat; Ze Xie, Hua Shi, and Tong Cao to promote urination; and Mu Dan Pi to cool and invigorate Blood. Hua Shi is usually decocted in a bag.
Q8: Is Bi Xie Shen Shi Tang suitable for long-term use?
No. It is a short-course formula for active Lower Jiao Damp-Heat. Prolonged bitter-cold leaching injures the Spleen and Yin. Once weeping, heat, and turbidity recede, treatment should shift toward protecting the Spleen so Dampness is not regenerated.
Q9: Can this formula help both lower-leg eczema and cloudy urine or yellow leukorrhea?
Yes. The same Damp-Heat that pours into the skin of the legs can also cloud the urine and stain the discharge. Separating the clear from the turbid and leaching that Damp-Heat can improve both when they share one Lower Jiao pattern. Isolated Cold watery discharge is the wrong picture.
Q10: What lifestyle advice supports the use of Bi Xie Shen Shi Tang?
Keeping the feet clean and dry, reducing alcohol and sweet-greasy food, avoiding prolonged standing in heat and damp, and seeking care for spreading redness, fever, or poorly healing ulcers all support correct use. This formula treats a TCM Damp-Heat pattern; it is not a substitute for treating cellulitis or a diabetic ulcer.

General Questions

How do I choose the right formula?
TCM formulas are traditionally selected according to individual pattern differentiation rather than by symptom alone. If you're not sure which formula fits your presentation, take our AI Assessment below for a personalized starting point, then confirm with a qualified TCM practitioner.
What are concentrated herbal granules?
Concentrated herbal granules are made by decocting raw herbs, then extracting and concentrating the resulting liquid into a fine granule or powder form. This preserves the same active compounds as a traditional decoction while making the herbs far easier to store, measure, and prepare.
How should I take these products?
Dissolve the recommended amount of granules in hot water, stir until fully dissolved, and drink while warm — following the dosage and frequency advised by your TCM practitioner or as stated on the product packaging.
Are concentrated herbal granules equivalent to traditional decoctions?
Concentrated granules are produced from the same herbs and processed to retain their active compounds, so they are traditionally regarded as a convenient alternative to decoctions rather than a different remedy. Some practitioners note subtle differences in strength or absorption between the two forms, so your TCM practitioner may adjust dosage accordingly.
Are your products authentic?
Yes. HJMEDICAL sources its concentrated granules exclusively from established, reputable manufacturers such as Nong's and Hoi Tin, both long-standing names in the TCM granules industry, with GMP compliance stated directly on their packaging.
Are HJMEDICAL products manufactured under GMP standards?
HJMEDICAL sources its concentrated granules from established, reputable manufacturers such as Nong's and Hoi Tin, both long-standing names in the TCM granules industry. GMP compliance for these products is stated directly on their packaging.
Do you ship internationally?
Yes — we ship worldwide! Every order goes out via Hong Kong Post, and your exact shipping cost and estimated delivery time for your address are calculated and shown right at checkout, so there are never any surprises. We also offer free shipping once your order reaches our free-shipping threshold, so it's easy to stock up on your favorite formulas and save.
Can I take more than one formula at the same time?
Some formulas are traditionally combined, while others overlap or counteract each other. We recommend checking with a qualified TCM practitioner before combining formulas, especially if you are already taking other medication.
Are these products suitable during pregnancy or breastfeeding?
Some TCM formulas are not suitable during pregnancy or breastfeeding. Please consult a qualified TCM practitioner or your doctor before use if you are pregnant, trying to conceive, or nursing.
Do these products replace medical treatment?
No. These products are traditional herbal supplements intended to support wellbeing according to TCM principles — they are not a replacement for professional medical diagnosis or treatment. Please consult a qualified TCM practitioner or licensed healthcare provider before starting, stopping, or combining any treatment, especially if you have a chronic condition.
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.

Not sure which formula is right for you?

Take the AI Assessment

最新文章

Login

Forgot your password?

Don't have an account yet?
Create account

Bi Xie Shen Shi Tang: Classic TCM Formula for Damp-Heat in the Lower Burner, Cloudy Urine & Skin Dampness