Individual Herbs Notebook

Deng Xin Cao

Pharmaceutical: Medulla Junci
Taxonomy: Juncus effusus

Other names: Bulrush Pith / Rush Pith

Category: Herbs that Drain Dampness



Properties: Sweet, mild, slightly cold

Meridans Entered:
Primary: Heart, Lung and Small Intestine


Traditional Actions/Indications:
  1. Promotes urination, leaches out Dampness and unblocks painful urinary dysfunction
    Heat Excess Hot painful urinary dysfunction with dark, scanty urination
  2. 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
  3. Clears Lung Heat
    Sore throat (charred internally and topically relieves pain)
  4. Cools the Blood and stops bleeding
    Use charred to stop bleeding

Suggested Daily Dosage: 1-3g in decoction.


Cautions: It is contraindicated in case of urinary incontinence or deficiency-cold in lower energizer.


Appears in 12 formulae listed on this site: (click to display)
Research Links & References: (click to display)