1. Z2.1 Ling Gu 靈谷Magic Bone
In the depression besides the junction of the 1st and 2nd metacarpal bones
Insert perpendicularly 0.5-1.5 cun
(1) Pain: abdominal pain, sciatica, lumbago, and back pain (2) Lung: common cold, wheezing, and fever (3) Wood-wind: tinnitus, sudden deafness, migraine, and paralysis (4) Gynecology: irregular periods, difficult labor, and amenorrhea (5) Bladder: painful and frequent urination (6) Bi-syndrome: swelling joints
The acupoint is located in the region of He Gu - LI4 on the hand Yangming large intestine channel and belongs to the lung-metal. Since the earth is the mother of metal, this acupoint activates the Yangming digestion system stomach and large intestine to produce more Qi and blood to support the lung.
The He Gu - LI4 region relates to the lower back and the bladder channel at Da Chang Shu - BL25 i.e. the back-Shu point of the large intestine. Interestingly, the sciatica nerve is derived from spinal nerves L4 to S3, where Da Chang Shu - BL25 is located.
The acupoint is located in H1 of the hand region and belongs to liver wood. Metal controls wood. Therefore, it controls/balances the symptoms of hyperactive wind e.g. tinnitus and migraine. The gynecological organs are situated in the large intestine region, so the acupoint can also treat gynecological symptoms. Similarly, it treats various urinary disorders. Interestingly, the lung connects to the bladder and the liver to the large intestine according to the Extraordinary Connections between Zang and Fu Organs. The He Gu - LI4 region is characterized by a strong effect to move Qi and blood. Thus, it opens the blockage in Bi-syndrome.
In a word, it is an important acupoint to supplement the lung and to move Qi and open blockage.
2. Z2.2 Da Bai 大白 Big White
One cun distal to Ling Gu (Z2.1) or on the radial side of the mid-dle point of the 2nd metacarpal bone. In some MTA books, the acupoint is also located on the radial side of the index finger, in the substantial depression proximal to the head of the second metacarpal bone.
Insert perpendicularly towards Lao Gong - PC8 0.5-1.5 cun.
The same as Ling Gu (Z2.1)
Da Bai (Z2.2) and Ling Gu (Z2.1) are commonly used together. If the condition is mild, only one of them is strong enough.
These two acupoints are forbidden to be used for pregnant women.
Read more MTA points in Dr. Zhang's book EXTRAORDINARY ACUPOINTS: ATLAS OF APPLICATIONS, POCKETBOOK, ENGLISH