Pharmaceutical Latin: Medulla Junci
Common English: Juncus Pith
Rush Pit
Bulrush Pith
Herbs that Drain Dampness (Diuretics)
Taste Temperature Entering Meridians Dosage
Slightly Cold
Small Intestines
Tincture: 1-2ml
Actions Indications/Syndromes

Promotes urination, leaches out Dampness and unblocks painful urinary dysfunction

Heat Excess

Hot painful urinary dysfunction with dark, scanty urination

Clears Heat from the Heart channel by directing Fire downward and calms the Spirit

Pediatric sleep disorders with dark, scanty urine and irritability (especially at night) (can be used alone)

Lack of Communication between the Heart and Kidneys with insomnia and restless sleep

Heart Fire with Kidney Yin Deficiency

Heart and Kidney Yin Deficiency

Small Intestine Shi Heat

Clears Lung Heat

Sore throat (charred internally and topically relieves pain)

Cools the Blood and stops bleeding

Use charred to stop bleeding
  • Contraindicated for those with Spleen and Stomach Deficiency Cold.
  • Contraindicated for extremely deficient people.
  • Contraindicated for those with urinary incontinence.

Hb. Lophatheri
Dan Zhu Ye
Hb. Plantaginis
Che Qian Cao

Hua Shi

Hb. Plantaginis
Che Qian Cao

Rz. Imperatae
Bai Mao Gen

Lin syndrome.


Damp-Heat in the Heart, Lung and Urinary Bladder channels causing incomplete, painful urination.

Edema due to nephritis.

Sm. Zizyphi Spinosae
Suan Zao Ren
Fu Ling
Zhu Sha


Zhu Sha

Sm. Zizyphi Spinosae
Suan Zao Ren
Poria Pararadicis
Fu Shen

Hb. Lophatheri
Dan Zhu Ye
Zhu Sha

Caul. Akebiae
Mu Tong

Heart Fire causing insomnia, irritability and dark, painful urination.

Heart Fire causing insomnia, irritability and dark, painful urination.

Difficult, scanty and burning urination associated with Heart channel Heat shifting to the Large Intestine or Heat clumping in the Bladder or Damp-Heat lodging in the Lower Jiao.

Sm. Zizyphi Spinosae
Suan Zao Ren
Poria Pararadicis
Fu Shen

Fr. Tritici Levis
Fu Xiao Mai



Infantile night crying.



  1. This herb is especially beneficial for insomnia or restless sleep due to Heart and Kidney not Communicating (it has a very good sedative effect).
  2. In ancient times, its stem pith was used as lamp wicks.
  3. Occasionally this herb is used for abdominal pain.
  4. This herb has properties that are similar to Caulis Akebiae Mu Tong and is often combined with it.
  5. It is often used for infants or children with restless sensations of Heat in the chest, nightmares, night terrors and dark, burning urine due to Heat.
  6. This herb can be dipped in oil and used for cauterization.
  7. Apply topically for throat inflammation.
  8. Both Deng Xin Cao and Caul. Akebiae Mu Tong clear and drain Heart Fire and direct Small Intestine Heat out through the urine. They are used together to treat Lin syndrome. Mu Tong is bitter, cold and more powerful than Deng Xin Cao. It treats mouth and tongue ulcers and swollen, red eyes. It also unblocks the flow of Qi and Blood to treat amenorrhea, insufficient lactation or painful obstruction. Deng Xin Cao is milder and its treatment of the Heart is primarily aimed at children's night terrors due to Heart Heat. It also drains Lung Heat to treat sore throat.
  9. Both Deng Xin Cao and Hb. Phylostachys Zhu Ye clear Heart Fire and promote diuresis. Deng Xin Cao is better for Lin syndrome with burning and painful urination, while Zhu Ye more effectively sedates Heart Fire to treat irritability and insomnia.
  10. Charred Juncus Pith Deng Xin Tan cools the Blood, stops bleeding, clears Heat and inhibits sores.
  11. Juncus Flower Deng Xin Hua is often used to treat dysuria from Lower Jiao Damp-Heat.