On the dorsum of the foot, between the 2nd and 3rd metatarsal bones, in a depression proximal to the metatarsophalangeal joints.
🧭 How to find it (practical)
Supine or seated, locate the point in the depression anterior to the junction of the 2nd and 3rd metatarsal bones.
🔬 Anatomy
Second dorsal interosseous muscle. Innervated by the deep fibular nerve.
💉 Needling
Perpendicular or oblique insertion 0.5–1.0 cun.
📜 Etymology
Xian (陷), depression; Gu (谷), valley. Gu denotes a depression on the body surface. The point lies in the depression between the 2nd and 3rd metatarsal bones.
