ST2 Sibai

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

ST2 (Sibai, “Sibai”) is an acupuncture point on the Stomach Meridian. It is located on the face, in the depression at the infraorbital foramen, located 1 cun directly below the pupil when the eyes are looking straight ahead. It expels wind, clears heat, brightens the eyes, alleviates pain, activates the channel and stops twitching.

Location

On the face, in the depression at the infraorbital foramen, located 1 cun directly below the pupil when the eyes are looking straight ahead.

Needling

Perpendicular or oblique insertion inferiorly 0.3-0.5 cun, often towards the infraorbital foramen. Avoid deep insertion to prevent injury to the eyeball.

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TCM functions

Expels wind, clears heat, brightens the eyes, alleviates pain, activates the channel and stops twitching..

Indications

Eye pain, blurred vision, eye twitching, facial paralysis, mouth deviation, inability to speak, red and painful eyes, tearing, eye itching, white film over the eye, corneal opacity, dizziness, head pain, earache, ear ringing, inability to close the eye..

Clinical notes

Sibai is a primary local point for a wide range of eye disorders, from simple pain and redness to more complex conditions like cataracts and visual obstruction. Its location over the infraorbital foramen makes it effective for facial issues such as paralysis, twitching, and pain. The classical emphasis on its ability to treat both wind-related facial symptoms and various eye diseases highlights its importance for clearing pathogens from the upper Yangming channel.

On the Stomach channel

ST2 is one of 45 points on the Stomach Meridian. Nearby points:

ST1ST3ST4ST5ST6ST7ST8ST9

Frequently asked questions

Where is ST2 located?

ST2 (Sibai) is located on the face, in the depression at the infraorbital foramen, located 1 cun directly below the pupil when the eyes are looking straight ahead.

What is ST2 used for?

ST2 expels wind, clears heat, brightens the eyes, alleviates pain, activates the channel and stops twitching. Common clinical indications include eye pain, blurred vision, eye twitching, facial paralysis, mouth deviation, inability to speak, red and painful eyes, tearing, eye itching, white film over the eye, corneal opacity, dizziness, head pain, earache, ear ringing, inability to close the eye.

How is ST2 needled?

Perpendicular or oblique insertion inferiorly 0.3-0.5 cun, often towards the infraorbital foramen. Avoid deep insertion to prevent injury to the eyeball. Caution: Adjacent to the eyeball — press the globe aside, insert slowly without lifting/thrusting or rotating; do not needle deeply. Bruising is common. The Zi Sheng Jing warns that needling too deeply can cause the eye to become dark in color. The Jia Yi Jing notes a conflict, with one source saying it is contraindicated for moxibustion while another allows it.

Which meridian is ST2 on?

ST2 is a point on the Stomach Meridian (Zú Yángmíng Wèijīng).

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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.