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LV1

Dadun

Star

大敦 (Dàdūn) — Large Pile

Liver channel · point 1

Not yet clinically reviewed

Jing-Well pointWood pointWood point of the Liver channelHorary point

Traditionally used for

  • Urinary & fluids
  • Menstrual & women's health
  • Nerves & recovery

Location

On the great toe, lateral to the distal phalanx, 0.1 finger-cun proximal to the lateral corner of the toenail — where a line along the lateral border of the nail meets a line along its base.

How to locate: Imagine one line along the lateral border of the big toenail and another along its base; the point is where they cross, about 0.1 cun from the nail corner on the side facing the second toe.

Distances are in cun, a proportional unit — how to measure.

Body map, front: LV1 · Foot
Fig. — LV1 · Foot After Albinus, 1747
Body map, front: LV1 · Foot

LV1 · Foot · Albinus, Tabulae sceleti et musculorum, 1747

Bones of the foot, dorsal — Gray's Anatomy plate
Bones of the foot, dorsal Gray's Anatomy, 1918 Marker hidden while its position on this plate is re-checked.
Bones of the foot, dorsal — Gray's Anatomy plate

Bones of the foot, dorsal · Gray's Anatomy, 1918

3D view

3D view not available for this point: its position on the 3D model couldn't be checked against its location text, so it is not shown. The 2D maps above show it.

Needling

Cited needling

Techniques — the source gives these as alternatives:

  1. Perpendicular insertion
    Depth 0.1–0.2 cun
    skindeeper
  2. Oblique insertion — directed proximally
    Depth 0.1–0.2 cun
    skindeeper
  3. Prick to bleed

Depths describe average adult habitus in the cited population, never a single safe number for the patient in front of you. Palpate and adjust.

Sources (1)
  1. Deadman P, Al-Khafaji M, Baker K. A Manual of Acupuncture. Hove: Journal of Chinese Medicine Publications; 1998 — p. 473 Supports: techniques (names this point)

Site notes · not cited

Depth: 0.1–0.2 cun
Angle: Shallow perpendicular, or prick to bleed
Moxibustion: Direct moxibustion at LV1 is the classical treatment for hernia and for uterine bleeding of the deficient-cold type.

Functions

  • Regulates qi in the lower burner and relieves hernia
  • Spreads Liver qi and benefits the genitals
  • Stops uterine bleeding and regulates menstruation
  • Resolves dampness
  • Restores consciousness and opens the sense orifices

Indications

Hernia and testicular pain or retractionuterine bleeding and prolapseirregular menstruationdifficult urination and enuresisloss of consciousnessepilepsy

Balance Method partners

Under Dr. Tan's six systems, LV1 at the foot balances these channels at the regions its segment images.

Classical calendar method · 子午流注

When the tables open LV1

The hours Zi Wu Liu Zhu names this point at, by method. Times are the double-hour's start in UTC.

  • 乙酉 17:00–19:00 Na Jia Fa, 乙-day sequence · Jing-Well (井)

    「乙日酉時肝大敦」

    Next: Sun 18 Oct, 17:00

A classical reference, not a recommendation: the tables say when the method opens this point, not that it is the point to needle. Open points by the hour →

Clinical Notes

The Liver channel encircles the genitals, which is why its Jing-Well point is the primary distal choice for hernia and testicular disorders.

Sources

  • World Health Organization. WHO Standard Acupuncture Point Locations in the Western Pacific Region. Manila: WHO Regional Office for the Western Pacific, 2008. (Location.)
  • Focks C, ed. Atlas of Acupuncture. Edinburgh: Churchill Livingstone Elsevier, 2008. (Locating method and actions.)

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