SP1 Yinbai means 'Hidden White'

Reviewed by · Licensed Acupuncturist & TCM Physician · Last reviewed June 2026

SP1 (Yǐnbái, “Yinbai means '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.

Location

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.

Needling

Subcutaneous insertion 0.1-0.2 cun, or prick to bleed.

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TCM functions

Stops bleeding, calms the mind and restores consciousness, regulates the Spleen, harmonizes the middle jiao..

Indications

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..

Jing-Well pointWood point

Clinical notes

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.

On the Spleen Channel channel

SP1 is one of 21 points on the Spleen Channel Meridian. Nearby points:

Frequently asked questions

Where is SP1 located?

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.

What is SP1 used for?

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.

How is SP1 needled?

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).

Which meridian is SP1 on?

SP1 is a point on the Spleen Channel Meridian (Zú Tài Yīn Pí Jīng).

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⚠️ This page is for general education and is not medical advice. Acupuncture is a traditional practice; evidence varies by condition and study quality, and individual results differ. It does not replace diagnosis or treatment by a licensed professional. Always consult a qualified acupuncturist or physician.