Deep insertion can perforate the peritoneal cavity. Contraindicated in advanced pregnancy.
📍 Location (classical)
On the abdomen, 2 cun lateral to the umbilicus.
🧭 How to find it (practical)
Supine, locate the point 2 cun lateral to the umbilicus.
🔬 Anatomy
Rectus abdominis muscle. Innervated by the 10th intercostal nerve. Branches of the inferior epigastric artery and vein.
💉 Needling
Perpendicular insertion 1.0–1.5 cun.
📜 Etymology
Tian (天), heaven; Shu (枢), pivot. The region above the umbilicus is considered Heaven, belonging to Yang; the region below the umbilicus is Earth, belonging to Yin. The point lies at the level of the umbilicus, like a pivot between Heaven and Earth.
