Phellodendron

Applications

Clinical Applications

1. To treat yellow, turbid, and foul-smelling leukorrhea caused by damp-heat descending to the lower jiao, it is commonly combined with Chinese yam (Shanyao), water caltrop (Qianshi), and plantain seed (Cheqianzi), as in the Yi Huang Decoction (*Fu Qingzhu’s Gynecology*); to treat damp-heat descending to the bladder, resulting in scanty, red, hot, and painful urination, it is commonly combined with Smilax glabra (Biqi), Poria (Fuling), and plantain seed (Cheqianzi), as in the Biqi Fenqing Decoction (*Insights into Medicine*).

2. For treating diarrhea and dysentery, it is commonly combined with herbs such as Whitehead (Baitouweng), Coptis (Huanglian), and Qinpi, as in the Whitehead Decoction (Shanghan Lun); when combined with Gardenia (Zhizi), it can treat jaundice caused by stagnant damp-heat, as in the Gardenia and Cypress Bark Decoction (Shanghan Lun).

3. To treat swelling, pain, and atrophy of the legs caused by damp-heat descending to the lower body, it is often combined with Atractylodes lancea and Achyranthes bidentata, as in the San Miao Pill (*Insights into Medicine*). When combined with Anemarrhena asphodeloides, prepared Rehmannia glutinosa, and turtle shell, it can treat atrophy caused by yin deficiency with excessive fire, as in the Hu Qian Pill (*Danxi’s Heart Method*).

4. To treat yin deficiency with excessive fire, characterized by tidal fever, night sweats, lower back soreness, and seminal emission, it is often used in synergy with Anemarrhena, along with Raw Rehmannia and Chinese Yam, as in the Anemarrhena-Phellodendron-Rehmannia Pill (from *The Golden Mirror of Medical Orthodoxy*); or combined with Prepared Rehmannia and Turtle Shell, as in the Great Yin-Nourishing Pill (from *Danxi’s Heart Method*).

5. For treating sores, abscesses, and toxic swellings, it can be used both internally and externally. For example, in Huanglian Jiedu Decoction (*Wai Tai Mi Yao*), this herb is combined with Scutellaria baicalensis, Coptis chinensis, and Gardenia jasminoides and taken as a decoction;or Er Huang San (from *Divine and Effective Secret Formulas for Boils and Abscesses*), which combines this herb with Rheum officinale into a powder, mixed with vinegar for topical application; to treat eczema and itching, it can be combined with Schizonepeta tenuifolia, Sophora flavescens, and Cortex Phellodendri to be decocted and taken orally; it can also be combined with calcined gypsum in equal parts to form a powder, which is sprinkled externally or mixed with oil and applied to the affected area, such as in Shi Huang San (from *Secret Transmission of the Blue Sack*).

Related Compatibility

1. Phellodendron combined with Pulsatilla: Phellodendron excels at purging kidney fire and clearing damp-heat in the lower jiao; Pulsatilla enters the Stomach and Large Intestine meridians, penetrates the blood to clear intestinal heat, and is highly effective at eliminating accumulated heat toxins in the stomach and intestines, making it a key herb for treating febrile dysentery. When these two herbs are used in combination, their ability to purge heat, dry dampness, clear the intestines, and detoxify is greatly enhanced. This formula is suitable for treating damp-heat dysentery.

2. Phellodendron combined with Asarum: Phellodendron specializes in purging kidney fire and clearing damp-heat in the lower jiao; Asarum is pungent, warm, and potent, dispersing head wind upward, unblocking kidney qi downward, and opening the orifices to relieve pain.When combined, these two herbs integrate cold and hot properties to complement each other. While Huang Bai moderates Xixin’s warming nature, Xixin still enters the Shaoyin channel to unblock kidney qi and open the orifices, facilitating the passage of fluid and assisting Huang Bai in purging “ministerial fire” and clearing damp-heat. This combination is suitable for conditions characterized by frequent and urgent urination with difficult urination and urinary tract pain.

3. Phellodendron combined with Cinnamon Bark: Phellodendron is bitter and cold; it clears ministerial fire, dries dampness, and consolidates yin. Cinnamon Bark is pungent, sweet, and extremely hot; it warms and tonifies kidney yang, strengthens fire, and dispels yin. These two herbs work synergistically to warm yang and transform qi without generating pathogenic heat, enabling yang to enter yin; they dry dampness and clear heat without causing cold stagnation, allowing yin to emerge from yang. This combination is suitable for conditions such as difficulty urinating and urinary retention caused by kidney yang deficiency, impaired qi transformation, and internal retention of damp-heat.

4. Phellodendron combined with Atractylodes: Phellodendron is bitter and cold, with a heavy aroma and taste; its nature is sinking and descending, excelling at clearing damp-heat in the Lower Jiao. Atractylodes has a pungent taste and a dispersing action; its nature is warm and drying. It transforms dampness and regulates the spleen, dispels wind and removes dampness, and treats both internal and external damp pathogens.When combined, Atractylodes’ ability to dry dampness is greatly enhanced by Phellodendron; conversely, Phellodendron, tempered by Atractylodes’ warmth, clears heat without damaging Yang. The two herbs complement and balance each other, acting in concert to descend to the lower jiao, resulting in a remarkable effect in clearing heat and drying dampness. This combination is indicated for heat-bi syndrome, swelling and pain in the tendons and bones due to descending damp-heat, weakness and flaccidity of the lower limbs, damp-heat leukorrhea, and eczema.

5. Phellodendron combined with Turtle Shell: Phellodendron is cold in nature, descending and moistening; it excels at purging ministerial fire and rescuing kidney water. Turtle Shell is cool in nature, with a thick and turbid quality; as a purely yin substance, it enters the Liver and Kidney meridians, tonifying the Liver and Kidney while nourishing yin and subduing fire.When used in combination, these two herbs complement each other: they nourish yin without retaining pathogens, clear and drain without damaging yin, and combine nourishment with descent and clearing with tonification. By addressing both the root and the symptoms, they jointly achieve the effect of nourishing yin and reducing fire. This combination is suitable for conditions such as bone-steaming fever, night sweats, seminal emission, soreness and weakness in the lower back and knees, and weakness of the tendons and bones resulting from deficiency of the liver and kidneys and yin deficiency with excessive fire.

Medicinal Identification

1. Raw Phellodendron, Salted Phellodendron, Wine-Processed Phellodendron, and Charred Phellodendron: Raw Phellodendron is bitter, drying, cold in nature, and sinking; it has a strong effect in purging fire, resolving toxins, and drying dampness. It is commonly used for damp-heat dysentery, jaundice, heat-induced dysuria, swelling and pain in the feet and knees, swollen and toxic sores, and eczema.Salt-processed Phellodendron has a milder bitter and drying nature; it is more effective at nourishing yin, reducing fire, and alleviating deficiency-heat. It is primarily used to treat yin deficiency fever, bone-consumptive fever with night sweats, nocturnal emissions, weakness and atrophy of the feet and knees, and coughing with hemoptysis.Wine-processed Phellodendron has a milder bitter and cold nature, which prevents damage to spleen yang. It utilizes the ascending properties of wine to direct the herb’s action upward, making it particularly effective at clearing heat in the upper jiao. It is used to treat conditions caused by heat stagnation in the upper jiao, such as red eyes, sore throat, mouth and tongue sores, and red or white vaginal discharge. Charred Phellodendron clears damp-heat while possessing astringent properties; it is frequently used for hematochezia and metrorrhagia.

2. Scutellaria baicalensis, Coptis chinensis, and Phellodendron amurense: All three herbs are bitter and cold in nature. They function to clear heat, dry dampness, purge fire, and resolve toxins. They are often used in combination to treat various conditions caused by damp-heat and fire-toxin, such as damp-heat diarrhea and dysentery, damp-heat jaundice, heat-toxin abscesses and swellings, redness and swelling of the eyes, blood-heat-induced vomiting of blood and epistaxis, and other fire-heat syndromes affecting various organs and viscera.The difference lies in the fact that Scutellaria baicalensis primarily enters the Lung and Large Intestine meridians, while also entering the Stomach and Gallbladder meridians, among others. Its action is focused on the Upper Jiao and the Large Intestine; it excels at clearing fire from the Lung and Large Intestine and has a significant hemostatic effect. It is particularly effective in treating warm diseases where heat has invaded the Qi,营, and Blood levels; lung heat-induced cough and wheezing; damp-heat; summer-heat dampness; damp-heat obstruction in the middle jiao; damp-heat dysuria with pain; and hemorrhoids with fistula and bloody stools;It can also clear heat and stabilize the fetus, treating fetal restlessness caused by fetal heat. Coptis (Huanglian) is extremely bitter and cold; it primarily enters the Heart and Stomach meridians, while also entering the Liver and Large Intestine meridians, among others. Its action is focused on the Heart and the middle jiao. It excels at clearing heat from the Heart and Stomach and eliminating damp-heat in the middle jiao. It is particularly effective for treating symptoms of warm diseases where heat has invaded the营 and blood levels—such as mental confusion and delirium, restlessness and insomnia,toothache caused by stomach fire, sores in the mouth and on the tongue, vomiting and acid regurgitation due to liver fire invading the stomach, fullness and distension caused by damp-heat, as well as excessive stomach fire leading to rapid digestion and constant hunger; furthermore, when used in small doses, it can strengthen the stomach, and when combined with herbs that tonify the spleen and stomach, it can treat spleen and stomach deficiency.Phellodendron (Huang Bai) is less potent than Coptis (Huang Lian). It primarily enters the Kidney and Bladder meridians, with its action focused on the Lower Jiao. It excels at clearing Kidney fire, reducing deficient heat, and eliminating damp-heat in the Lower Jiao. It is particularly effective for treating yin deficiency with excessive fire and bone-steaming tidal fever, as well as conditions caused by damp-heat in the Lower Jiao such as urinary retention, turbid dysuria, leukorrhea, genital itching, swelling and pain in the feet and knees, and beriberi.

3. Anemarrhena and Phellodendron: Both are bitter and cold in nature and capable of clearing heat, purging fire, and alleviating deficiency heat. They are often combined to treat syndromes of yin deficiency with internal heat, as in the formula Anemarrhena-Phellodendron-Rehmannia Pill (Zhibai Dihuang Wan). However, Anemarrhena is sweet, cold, and moisturizing; it is particularly effective at clearing and purging real fire in the Qi aspect of the lung and stomach, while also nourishing yin and moistening dryness. By combining clearing with tonification, it achieves an effect that addresses both the symptoms and the root cause when treating syndromes of yin deficiency with internal heat.Phellodendron (Huang Bai) is more intensely bitter and cold, primarily clearing heat and drying dampness, while also purging fire and resolving toxins; it is frequently used for conditions involving damp-heat, excess fire, and heat-toxin. When used to alleviate deficient heat, its focus is on addressing the symptoms by reducing fire, and it is often combined with herbs that tonify the kidneys and nourish yin.

Related Medicines

Bai Dai Wan, Mi Niao Ning Granules, Shi Re Bi Granules (Tablets), Ruyi Jin Huang San, and Jiu Sheng San.

Related Prescriptions

Yihuang Decoction (*Fu Qingzhu’s Gynecology*), Biqi Fenqing Decoction (*Yang’s Family Prescriptions*), Baitouweng Decoction (*Treatise on Cold Damage*), Sanmiao Pills (*Orthodox Transmission of Medicine*), Zhibai Dihuang Pills (*Examination of Medical Formulas*).

Medicinal Diet Therapy

1. Red Bean, Achyranthes, and Phellodendron Tea

(1) Effects: Clears heat, drains dampness, detoxifies, and reduces swelling. Mainly used to treat erysipelas, redness, swelling, and pain in the lower limbs caused by damp-heat descending to the lower body.

(2) Ingredients: 15 grams of adzuki beans; 10 grams each of Achyranthes root and Sichuan Phellodendron bark.

(3) Preparation: Coarsely grind the adzuki beans, Achyranthes root, and Sichuan Phellodendron bark into a coarse powder. Place the mixture in a thermos, pour in an appropriate amount of boiling water, cover, and let steep for 20 minutes before drinking while hot.

(4) Usage: Drink frequently in place of tea; one dose per day.

2. Nasal Discharge Huangbai Tea

(1) Effects: Clears heat, dries dampness, detoxifies, and unblocks the orifices. Mainly treats chronic nasal congestion, persistent purulent nasal discharge, and redness and swelling of the nasal mucosa caused by “nasal obstruction” or “nasal discharge,” which may be accompanied by chills and fever, headache, or distending pain in the brow and forehead. This corresponds to chronic rhinitis and sinusitis in modern medicine. It may also be used for suppurative otitis media.

(2) Ingredients: 15 grams of Longjing tea, 9 grams of Sichuan Phellodendron.

(3) Preparation: Grind the herbs into a fine powder, place in a thermos, pour an appropriate amount of boiling water over them, cover, and let steep for 15 minutes.

(4) Usage: Drink as a tea substitute. One dose per day; or blow the fine powder directly into both nostrils 2–3 times daily.

3. Phellodendron and Anemarrhena Wine

(1) Efficacy: Nourishes yin and reduces internal heat. Mainly treats yin deficiency with excessive internal heat, consumptive fever, and pain and weakness in the feet and knees in the elderly.

(2) Ingredients: 40 grams of Phellodendron bark, 40 grams of Anemarrhena rhizome, 40 grams of turtle shell, and 1 liter of rice wine.

(3) Preparation: Stir-fry Phellodendron bark until brown; stir-fry Anemarrhena rhizome for about 10 minutes; roast the turtle shell until crisp. Coarsely grind all three ingredients together, place them in a muslin bag, tie the opening securely, and immerse the bag in the rice wine. Seal the container. After steeping for 15 days, strain to remove the residue and retain the liquid for later use.

(4) Dosage: Take 10 milliliters once daily after lunch.

Notes

Patients requiring treatment with traditional Chinese medicine should first consult a licensed TCM hospital, where a TCM practitioner will conduct a professional diagnosis and prescribe the appropriate herbal formula.