Deep perpendicular insertion carries a risk of puncturing the kidney.
📍 Location (classical)
In the lumbar region, 1.5 cun lateral to the inferior border of the spinous process of the second lumbar vertebra (L2). At the level of the navel.
🧭 How to find it (practical)
In ventral or lateral decubitus, locate the point 1.5 cun lateral to Ming Men (GV-4), which lies opposite the umbilical scar.
🔬 Anatomy
Thoracolumbar fascia, latissimus dorsi, erector spinae, and quadratus lumborum muscles. Innervated by the dorsal branches of the L1 and L2 lumbar nerves.
💉 Needling
Perpendicular or oblique insertion toward the spine, 0.5–1.0 cun.
📜 Etymology
Shen (肾), Kidney; Shu (俞), point. Place where the Qi of the Shen (Kidney) reaches the back.
