LU-4 - Guarding White

侠白 - Xiá bái

Point Region: Upper arm

LU

Lung Meridian

手太阴肺经 - Shǒu Tàiyīn Fèi Jīng

Location & How to Find

Anatomical Location: On the front and outer side of the upper arm, just outside the edge of the biceps muscle, 4 cun below the front fold of the armpit. It lies 1 cun below LU-3.

Distances are in cun, a unit that scales with each person's body. As a guide, the width of your thumb at its joint is 1 cun, and your four fingers held together, measured across the middle joints, are 3 cun.

How to Locate:

  1. Find LU-3, one third of the way from the front armpit fold to the elbow crease
  2. Move one thumb-width further down
  3. The point is just outside the edge of the biceps, on the thumb side
LU-4 (Guarding White) acupressure point location: On the front and outer side of the upper arm, just outside the edge of the biceps muscle, 4 cun below the front fold of the armpit.

How to Apply Pressure

With LU-4 identified, rest a fingertip gently against the upper arm and keep the contact comfortable. Skip it after recent arm surgery or a severe arm injury; do not use acupressure for acute breathing trouble or chest pain—seek urgent medical care.

Traditional Indications

In TCM, this point is traditionally used for:

  • Cough
  • Arm discomfort
  • Respiratory problems
  • Arm pain

Related Health Concerns

Cold and Flu Onset

Select a point to see its location, how to find it, and its traditional uses.

Important Precautions

Avoid this point with:

  • Recent arm surgery
  • Severe arm injury
  • Acute respiratory distress