Lung MeridianLU4

Xiabai 俠白

For reference only · not a substitute for diagnosis or treatment

Short answer

Front-outer upper arm, 4 cun below the anterior axillary fold.

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

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

Xiabai — 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.

Xiabai — ③ Under the skin — **③ Under the skin**
Biceps brachii · Humerus

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

On this page

Where is Xiabai?
How do I find it on my body?
Before you press
FAQ

1Where is Xiabai?

Front-outer upper arm, 4 cun below the anterior axillary fold.

It is on the same vertical line as Tianfu (LU3), just outside the outer border of the biceps brachii.

Beneath the point

Biceps brachii · Humerus

Our 3D measurement · In our 3D model: 5.00 cun above Chize (LU5; 1 upper-arm cun = 21.8 mm), 6.2 mm lateral to the biceps brachii, 22.0 mm (about 1 cun) from Tianfu (LU3) along the skin. A study found finger-width measuring missed this point by 22 mm on average (about 1 cun), so we use the 9-part split.

2How do I find it on my body?

Mark the front end of the armpit fold and the elbow crease.
Split that span into 9 equal parts. Find the halfway point (4.5 parts down), then move half a part up: that is the 4th mark.
At that height, feel the outer edge of the biceps and press just outside it.

📖 Words explained

anterior axillary fold: The fold at the front of the armpit with the arm at the side, made by the lower edge of pectoralis major. Its top end is a starting mark for measuring upper-arm points.
biceps brachii: The 'biceps' at the front of the upper arm; its two heads join on the radius to bend the elbow and turn the palm up. Bend the arm and you feel its thick tendon in the crook of the elbow.

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.

?FAQ

Where exactly is Xiabai?

Front-outer upper arm, 4 cun below the anterior axillary fold. It is on the same vertical line as Tianfu (LU3), just outside the outer border of the biceps brachii.

How do I find Xiabai?

Mark the front end of the armpit fold and the elbow crease. Split that span into 9 equal parts. Find the halfway point (4.5 parts down), then move half a part up: that is the 4th mark. At that height, feel the outer edge of the biceps and press just outside it.

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.

← PreviousTianfu · LU3 Next →Chize · LU5

Sources

Location: WHO Standard Acupuncture Point Locations in the Western Pacific Region (2008), p. 27
Standard comparison: Chinese national standard GB/T 12346-2021 (Nomenclature and location of meridian points)
Locating tips: KMCRIC Standard Acupoint DB (Korea)
Locating-error study: Dorsher & Johnson 2010 (as reported in Godson & Wardle 2019)

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.