LR1 (Dà Dūn, “Dà Dūn”) is the Jing-Well Point point of the Liver Channel of Foot Jueyin Meridian. It is located on the dorsal aspect of the great toe, at the junction of lines drawn along the lateral border of the nail and the base of the nail, in the tuft of hair approximately 0.1 cun from the corner of the nail. It revives consciousness, regulates urination and the genitals, alleviates pain, calms the spirit, and stops abnormal uterine bleeding.
On the dorsal aspect of the great toe, at the junction of lines drawn along the lateral border of the nail and the base of the nail, in the tuft of hair approximately 0.1 cun from the corner of the nail.
Subcutaneous insertion 0.1-0.2 cun, or prick to bleed.
Revives consciousness, regulates urination and the genitals, alleviates pain, calms the spirit, and stops abnormal uterine bleeding.
Corpse-like collapse (syncope) where the person is unconscious but the pulse is normal, sudden heart pain with sweating, hernia, uterine prolapse, uterine bleeding, urinary incontinence, difficult urination, five types of urinary strangury (lin syndrome), swelling and pain of the genitals, pain in the lower abdomen, mania and epilepsy in adults and children, fright epilepsy, mania with desire to run, madness with seeing ghosts, preference for sleeping, contracted sinews, testicular retraction, pain around the navel, abdominal distention.
As the Jing-Well point of the Liver channel, Dadun is a critical point for emergencies, particularly for reviving consciousness from collapse or syncope, often by pricking to bleed. Its strong action on the Lower Jiao makes it a primary point for genital and urinary disorders, such as hernia, prolapse, and urinary incontinence. It is also frequently used in combinations to stop excessive uterine bleeding and to calm the spirit in cases of mania or epilepsy.
Classical text; the translation was prepared with AI and is not clinical advice.
《針灸甲乙經》 Zhēnjiǔ Jiǎyǐ Jīng — Systematic Classic of Acupuncture & Moxibustion, c. 256–282 · 卷09 · Source: Wikisource ↗
陰跳遺溺，小便難而痛，陰上下入腹中，寒疝陰挺出偏大腫，腹臍痛，腹中悒悒不樂，大敦主之The text records that LR1 was used for twitching of the genitals with enuresis, difficult painful urination, the genitals drawing up into the abdomen, cold shan with protrusion and one-sided swelling of the genitals, pain around the navel, and a gloomy, oppressed feeling in the abdomen.
《扁鵲神應針灸玉龍經》 Biǎn Què Shényìng Zhēnjiǔ Yùlóng Jīng — Bian Que's Jade Dragon Classic of Divinely Responsive Acupuncture & Moxibustion, 1329 · 疝气 · Source: Wikisource ↗
大敦∶在足大趾端，去爪甲如韭叶大及三毛中。 针三分，沿皮向后三分，有泻有补。 此穴亦治足寒湿脚氣According to this text, LR1 lies at the tip of the big toe, a chive leaf's width from the nail, among the 'three hairs'; it is needled 0.3 cun along the skin backwards, with draining or tonifying, and was also used for cold-damp foot and leg qi (jiaoqi).
《備急千金要方》 Bèijí Qiānjīn Yàofāng — Essential Prescriptions Worth a Thousand Gold for Emergencies, c. 650 · 第二 · Source: Wikisource ↗
妊娠一月，足厥陰脈養，不可針灸其經（如大敦、行間、太沖、中封、五裡The text states that in the first month of pregnancy, when the foot jueyin channel nourishes the fetus, its points, including LR1, must not be needled or moxibusted.
《針方六集》 Zhēnfāng Liùjí — Six Collections on Needling, Wu Kun, 1618 · 卷之六·兼羅集 · 七疝偏疼六十四 · Source: jicheng.tw ↗
大敦，穴在足大指端直甲後，去爪甲如韭葉及三毛中。 針入一分，沿皮向後三分，單瀉無補According to this text, LR1 lies at the tip of the big toe straight behind the nail, a chive leaf's width from it, among the 'three hairs'; needle 0.1 cun, then 0.3 cun along the skin backwards, draining only and never tonifying.
LR1 is one of 14 points on the Liver Channel of Foot Jueyin Meridian. Nearby points:
LR1 (Dà Dūn) is located on the dorsal aspect of the great toe, at the junction of lines drawn along the lateral border of the nail and the base of the nail, in the tuft of hair approximately 0.1 cun from the corner of the nail.
LR1 revives consciousness, regulates urination and the genitals, alleviates pain, calms the spirit, and stops abnormal uterine bleeding. Common clinical indications include corpse-like collapse (syncope) where the person is unconscious but the pulse is normal, sudden heart pain with sweating, hernia, uterine prolapse, uterine bleeding, urinary incontinence, difficult urination, five types of urinary strangury (lin syndrome), swelling and pain of the genitals, pain in the lower abdomen, mania and epilepsy in adults and children, fright epilepsy, mania with desire to run, madness with seeing ghosts, preference for sleeping, contracted sinews, testicular retraction, pain around the navel, abdominal distention.
Subcutaneous insertion 0.1-0.2 cun, or prick to bleed. Caution: The Qian Jin Yao Fang states that during the first month of pregnancy, one must not needle or moxa points on the Liver channel, including Dadun.
LR1 is a point on the Liver Channel of Foot Jueyin Meridian (Zú Juéyīn Gānjīng).