On the radial aspect of the hand, between the 1st and 2nd metacarpal bones, closer to the 2nd metacarpal bone and approximately at its midpoint.
How to find
When pressing the thumb and index finger together, the adductor pollicis and the interosseus dorsalis muscles will form a bulge.
Needle L.I.-4 at the highest point of the bulge and push it further towards the inferior aspect of the second metacarpal bone. Or: Spread the thumb and forefinger and place the distal phalanx of the thumb of the other hand on the webbed border. When flexing the thumb, its tip will point to L.I.-4. Or: Insertion on the angle bisector between the 1st and 2nd metacarpal bones, needling in the direction of the midpoint of the second metacarpal bone.
Caution: Reducing needle techniques are contraindicated during pregnancy; exception: to induce labour.
● Releases the Exterior (main point!)
● Regulates the face and head
● Regulates the Defensive Qi (wei qi) and sweating
● Opens the channel and luo-connecting vessels
● Alleviates pain
● Promotes labour
Yuan-source point, Gao Wu command point for the head and mouth, Ma Dan Yang Heavenly Star point, entry point according to some authors. Most important analgesic point for the whole body.
Most important single distal point for disorders of the face and sensory organs. It is the most commonly used point in clinical practice. The combined bilateral needling of L.I.-4 and ➞LIV-3 (between the 2nd and 3rd metatarsal bones) is known as si guan (Four Gates): they strongly regulate the Qi and Blood, stop pain and relieve spasms.