SP1 (Yǐnbái, “Hidden White”) is the Jing-Well point point of the Spleen Channel Meridian. It is located on the medial aspect of the great toe, approximately 0.1 cun proximal to the corner of the nail bed, at the junction of the red and white skin. It stops bleeding, calms the mind and restores consciousness, regulates the Spleen, harmonizes the middle jiao.
On the medial aspect of the great toe, approximately 0.1 cun proximal to the corner of the nail bed, at the junction of the red and white skin.
Subcutaneous insertion 0.1-0.2 cun, or prick to bleed.
Stops bleeding, calms the mind and restores consciousness, regulates the Spleen, harmonizes the middle jiao.
Abdominal fullness, desire to vomit, vomiting and diarrhea, sudden corpse-like collapse (shi jue) with loss of awareness but a palpable pulse, cold feet, menorrhagia (menses continuing past its time), infantile convulsions (slow type), infantile fright, thirst from fluid retention with prostration and excessive salivation, abdominal cold, nosebleed with headache, cholera-like disorders.
As the Jing-Well and Wood point of the Spleen channel, Yinbai is a primary point for stopping bleeding, especially uterine bleeding from Spleen Qi deficiency, for which it is famously effective with moxibustion. Its ability to restore consciousness makes it a key point in first aid for collapse or fainting, particularly from deficiency patterns. It also treats acute digestive upsets like vomiting and diarrhea by regulating the Spleen's function in the middle jiao.
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07 · Source: Wikisource ↗
氣喘，熱病衄不止，煩心善悲，腹脹，逆息熱氣，足脛中寒，不得臥，氣滿胸中熱，暴泄，仰息，足下寒，中悶，嘔吐，不欲食飲，隱白主之The text records that SP1 was used for wheezing, febrile disease with unceasing nosebleed, vexation and sadness, abdominal distension, counterflow breathing with hot qi, cold in the shins, inability to lie down, fullness and heat in the chest, sudden diarrhoea, breathing with the head tilted back, cold soles, oppression, vomiting and no desire to eat or drink.
《千金翼方》 Qiānjīn Yìfāng — Supplement to the Thousand Gold Prescriptions, c. 682 · 卷26 · Source: Wikisource ↗
隱白在足大指端內側，去爪甲角如韭葉According to this text, SP1 lies on the inner side of the tip of the big toe, about a chive-leaf's width from the corner of the nail.
《針灸逢源》 Zhēnjiǔ Féngyuán — Sources of Acupuncture & Moxibustion, Li Xuechuan, 1815 · 卷四 · 經穴考正 · 足太陰脾經穴考 · Source: jicheng.tw ↗
隱白 在足大指內側去爪甲角如韭葉。 脾脈所出為井（針一分。 灸二壯。 ）治腹脹暴泄According to this text, SP1 lies on the inner side of the big toe, a chive-leaf's width from the nail corner, and is the jing-well point where the spleen channel emerges; needle 0.1 cun, moxibustion 2 cones. It was used for abdominal distension and sudden diarrhoea.
《鍼灸聚英》 Zhēnjiǔ Jùyīng — Gathering of Eminent Acupuncturists, Gao Wu, 1529 · Source: Wikisource ↗
己隱白（井木）足寒並暴泄The text records SP1 as the jing-well (wood) point of the ji (spleen) channel, used for cold feet and sudden diarrhoea.
SP1 is one of 21 points on the Spleen Channel Meridian. Nearby points:
SP1 (Yǐnbái) is located on the medial aspect of the great toe, approximately 0.1 cun proximal to the corner of the nail bed, at the junction of the red and white skin.
SP1 stops bleeding, calms the mind and restores consciousness, regulates the Spleen, harmonizes the middle jiao. Common clinical indications include abdominal fullness, desire to vomit, vomiting and diarrhea, sudden corpse-like collapse (shi jue) with loss of awareness but a palpable pulse, cold feet, menorrhagia (menses continuing past its time), infantile convulsions (slow type), infantile fright, thirst from fluid retention with prostration and excessive salivation, abdominal cold, nosebleed with headache, cholera-like disorders.
Subcutaneous insertion 0.1-0.2 cun, or prick to bleed. Caution: Traditionally avoided or used with caution in PREGNANCY (strong qi/blood-moving or labour-promoting action).
SP1 is a point on the Spleen Channel Meridian (Zú Tài Yīn Pí Jīng).