合谷, hé gǔ, "Union Valley"
On the dosum of the hand, between the 1st and 2nd metacarpal bones, approximately in the middle of the 2nd metacarpal bone on the radial side. Or, place in coincident position the transverse crease of the interphalageal joint of the thumb with the margin of the web between the thumb and the index finger of the other hand. The point is where the tip of the thumb touches.
On the dorsum of the hand, between the first and second metacarpal bones, at the midpoint of the second metacarpal bone and close to its radial border.
Ask the patient to squeeze the thumb against the base of the index finger, and locate Hegu L.I.-4 at the highest point of the bulge of the muscle and approximately level with the end of the crease.
The venous network of the dorsum of the hand.
1. Perpendicular insertion 0.5 to 1 cun. 2. Oblique insertion directed proximally 1 to 1.5 cun.