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.
On the face, in the depression at the infraorbital foramen, located 1 cun directly below the pupil when the eyes are looking straight ahead.
Perpendicular or oblique insertion inferiorly 0.3-0.5 cun, often towards the infraorbital foramen. Avoid deep insertion to prevent injury to the eyeball.
Expels wind, clears heat, brightens the eyes, alleviates pain, activates the channel and stops twitching.
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.
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.
Classical text; the translation was prepared with AI and is not clinical advice.
《針灸大成》 Zhēnjiǔ Dàchéng — Great Compendium of Acupuncture & Moxibustion, 1601 · 卷八 · Source: Wikisource ↗
（ 音純） 四白 目下一寸，直瞳子，令病人正視取之，素註，針四分，甲乙銅人針三分， 灸七壯It is located 1 cun below the eye, directly below the pupil, found with the patient looking straight ahead, according to this text (ST2); the Suwen commentary gives a needling depth of 0.4 cun, Jiayi and Tongren 0.3 cun, with 7 moxa cones.
《神灸經綸》 Shénjiǔ Jīnglún — Principles of Divine Moxibustion, Wu Yiding, 1851 · 卷之二 · 十二經脈起止 · 胃經四十五穴分寸 · Source: jicheng.tw ↗
四白 從承泣直下三分頰空骨內亦直瞳子取之禁灸甲乙經曰灸七壯According to this text, ST2 is found 0.3 cun straight below Chengqi in the hollow of the cheekbone, in line with the pupil; moxibustion is stated to be prohibited, although the Jiayi jing is cited as giving 7 cones.
《針灸資生經》 Zhēnjiǔ Zīshēng Jīng — Classic of Nourishing Life with Acupuncture & Moxibustion, 1220 · Source: Wikisource ↗
四白 二穴．在目下一寸．灸七壯．針三分．凡用針穩審方得．下針深、即令人目烏色According to this text, ST2 lies 1 cun below the eye and was given 7 moxa cones and needled 0.3 cun; it warns that the needle must be handled with care, as deep needling was said to darken the eye.
《針灸甲乙經》 Zhēnjiǔ Jiǎyǐ Jīng — Systematic Classic of Acupuncture & Moxibustion, c. 256–282 · 卷12 · Source: Wikisource ↗
目痛口僻戾（一作淚出），目不明，四白主之The text records that ST2 was used for eye pain with a deviated mouth (one variant reads tearing) and unclear vision.
ST2 is one of 45 points on the Stomach Meridian. Nearby points:
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.
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.
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.
ST2 is a point on the Stomach Meridian (Zú Yángmíng Wèijīng).