Stomach MeridianST2

Sibai 四白

For reference only · not a substitute for diagnosis or treatment

Short answer

At the infraorbital foramen, the small opening in the upper jaw bone below the pupil.

See it in 3DRotate the body and peel back the skin to see the bones and muscles beneath.
Open the 3D Acupoint Map →

🖼See it in pictures

Sibai — ① Where on the body? — **① Where on the body?**

Sibai — Textbook view — skin on the left, muscle and bone underneath on the right — **Textbook view — skin on the left, muscle and bone underneath on the right**
Location and structures come from our 3D model; only the drawing style was refined with AI. Labels are added by us.

Sibai — ③ Under the skin — **③ Under the skin**
Zygomaticus minor muscle · Levator labii superioris · Angular artery · Maxilla

Rendered straight from the 3D model at the computed location. The glowing ring marks Sibai.

On this page

Where is Sibai?
How do I find it on my body?
Before you press
How has it been used traditionally?
FAQ

1Where is Sibai?

At the infraorbital foramen, the small opening in the upper jaw bone below the pupil.

It lies on the pupil line, lower than ST1.

It is on the face.

Beneath the point

Zygomaticus minor muscle · Levator labii superioris · Angular artery · Maxilla

Our 3D measurement · In our 3D model: skin right in front of the infraorbital foramen, found by depth-mapping the front of the maxilla; the opening lies 4.2 mm toward the nose from the pupil line, 8.8 mm below ST1.

2How do I find it on my body?

Look straight ahead and picture a line dropping from the pupil.
From the bony rim under the eye, move a little further down that line.
Feel gently over the front of the upper jaw bone.

Check · the small dip you find is the infraorbital foramen.

📖 Words explained

infraorbital foramen: A small hole in the maxilla a little below the lower rim of the eye socket, where a nerve and vessels come out to the cheek. It feels like a slight dip under the fingertip.
levator labii superioris: A muscle running from below the eye down to the upper lip. It lifts the upper lip.
angular artery: The end part of the facial artery. It climbs beside the nose and ends near the inner corner of the eye.
zygomaticus minor: A thin muscle just inside zygomaticus major, linking the cheekbone to the upper lip. It lifts the upper lip.

3Before you press

⚠ Do not press when

Facial skin is thin, so press lightly with a fingertip only.
Do not push upward toward the eyeball.
Avoid broken or swollen skin and press only to a comfortable level.
Acupressure is not a substitute for medical care.

4How has it been used traditionally?

The name joins si (four) and bai (white, bright). Found by touch: a small dip in the bone straight below the pupil — the infraorbital foramen.

From traditional texts — not a claim of effect.

?FAQ

Where exactly is Sibai?

At the infraorbital foramen, the small opening in the upper jaw bone below the pupil. It lies on the pupil line, lower than ST1. It is on the face.

How do I find Sibai?

Look straight ahead and picture a line dropping from the pupil. From the bony rim under the eye, move a little further down that line. Feel gently over the front of the upper jaw bone. the small dip you find is the infraorbital foramen.

What should I watch out for?

Facial skin is thin, so press lightly with a fingertip only. Do not push upward toward the eyeball. Avoid broken or swollen skin and press only to a comfortable level. Acupressure is not a substitute for medical care.

← PreviousChengqi · ST1 Next →Juliao · ST3

Sources

Location: WHO Standard Acupuncture Point Locations in the Western Pacific Region (2008), p. 46
Standard comparison: Chinese national standard GB/T 12346-2021 (Nomenclature and location of meridian points)
Korean anatomical terms and locating tips: KMCRIC Standard Acupoint DB (Korea)
Classification cross-check: AcuAtlas dataset (CC BY 4.0)

Positions computed from the WHO standard locations (2008) on Z-Anatomy (CC BY-SA 4.0) · BodyParts3D © DBCLS. For reference only — not a substitute for diagnosis or treatment. See a clinician if you are unwell.