LU4 Xiabai means 'Clasping the White'

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

LU4 (Xiabai, “Xiabai means 'Clasping the White'”) is an acupuncture point on the Lung Channel of Hand Taiyin Meridian. It is located on the anterolateral aspect of the upper arm, on a line connecting LU3 (Tianfu) and LU5 (Chize), 4 cun superior to the cubital crease, or 5 cun inferior to the anterior axillary fold, in the depression on the lateral side of the biceps brachii muscle. It regulates Lung Qi, soothes the chest, and alleviates pain.

Location

On the anterolateral aspect of the upper arm, on a line connecting LU3 (Tianfu) and LU5 (Chize), 4 cun superior to the cubital crease, or 5 cun inferior to the anterior axillary fold, in the depression on the lateral side of the biceps brachii muscle.

Needling

Perpendicular insertion 0.5 to 1 cun.

TCM functions

Regulates Lung Qi, soothes the chest, and alleviates pain..

Indications

Heart pain, shortness of breath, dry heaving, vexation and fullness, cough..

Clinical notes

Xiabai is located on the upper arm and is primarily used for local issues and conditions related to Lung Qi rebellion. Its classical indications point to its use for chest discomfort, such as heart pain and shortness of breath, as well as digestive upset like dry heaving. It is also indicated for cough with a sense of fullness and vexation in the chest.

On the Lung Channel of Hand Taiyin channel

LU4 is one of 11 points on the Lung Channel of Hand Taiyin Meridian. Nearby points:

Frequently asked questions

Where is LU4 located?

LU4 (Xiabai) is located on the anterolateral aspect of the upper arm, on a line connecting LU3 (Tianfu) and LU5 (Chize), 4 cun superior to the cubital crease, or 5 cun inferior to the anterior axillary fold, in the depression on the lateral side of the biceps brachii muscle.

What is LU4 used for?

LU4 regulates Lung Qi, soothes the chest, and alleviates pain. Common clinical indications include heart pain, shortness of breath, dry heaving, vexation and fullness, cough.

How is LU4 needled?

Perpendicular insertion 0.5 to 1 cun.

Which meridian is LU4 on?

LU4 is a point on the Lung Channel of Hand Taiyin Meridian (Shǒu Tàiyīn Fèijīng).

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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.