Small Intestine MeridianSI4

Wangu 腕骨

For reference only · not a substitute for diagnosis or treatment

Short answer

Back-inner (ulnar) side of the wrist, in the hollow between the base of the fifth metacarpal and the triquetrum, on the skin-colour boundary.

Yuan-source point

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

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

Wangu — 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.

Wangu — ③ Under the skin — **③ Under the skin**
Fifth metacarpal bone · Hamate bone · Triquetrum bone

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

On this page

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

1Where is Wangu?

Back-inner (ulnar) side of the wrist, in the hollow between the base of the fifth metacarpal and the triquetrum, on the skin-colour boundary.

Beneath the point

Fifth metacarpal bone · Hamate bone · Triquetrum bone

Our 3D measurement · In our 3D model: at the level between the base of the 5th metacarpal and the triquetrum, on the ulnar edge where back-of-hand and palm skin meet.

2How do I find it on my body?

Put a finger on SI3 (Houxi).
Push it along the fifth metacarpal toward the wrist until it stops at a bony ridge (the base of that bone).
Press the hollow between that ridge and the next bone, the triquetrum.

3Before you press

⚠ Do not press when

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?

Classified as the Yuan-source point of the Small Intestine meridian — a historical classification, not a claim of effect.
The name simply means 'wrist bone'.

From traditional texts — not a claim of effect.

?FAQ

Where exactly is Wangu?

Back-inner (ulnar) side of the wrist, in the hollow between the base of the fifth metacarpal and the triquetrum, on the skin-colour boundary.

How do I find Wangu?

Put a finger on SI3 (Houxi). Push it along the fifth metacarpal toward the wrist until it stops at a bony ridge (the base of that bone). Press the hollow between that ridge and the next bone, the triquetrum.

What should I watch out for?

Avoid broken or swollen skin and press only to a comfortable level. Acupressure is not a substitute for medical care.

← PreviousHouxi · SI3 Next →Yanggu · SI5

Sources

Location: WHO Standard Acupuncture Point Locations in the Western Pacific Region (2008), p. 89
Standard comparison: Chinese national standard GB/T 12346-2021 (Nomenclature and location of meridian points), p. 15
Korean anatomical terms: KMLE medical dictionary (Korean Medical Association terms)
Yuan-source source: Lingshu ch. 2 (Ben Shu); Nanjing ch. 66
Classification and traditional-use 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.