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Location Guides:![]() |
Back Shu point of the San Jiao
Trigger point (Travell & Simons, 1998, Trigger Point Manual)
Meeting of Bladder with San Jiao Divergent
1.5 cun lateral to the lower border of the spinous process of the first lumbar vertebra (L1).
Oblique or perpendicular-oblique insertion towards the spine 1 - 1.5 cun
Perpendicular needling carries a risk of injuring the kidney.
"The Taiyang usually has much Blood and little Qi" (Su Wen 素問 ch. 24) implying this channel should normally be bled.
"The foot Taiyang is to be pierced 5 fen deep and remain inserted for seven exhalations" (Ling Shu 靈樞 ch. 12).
"It is needled to a depth of five fen and moxaed with three cones" (Huangfu Mi 皇甫謐, 3rd Century, Zhenjiu Jiayi Jing 針灸甲乙經).
Moves and regulates the San Jiao
Regulates the Spleen and Stomach and resolves Dampness
Regulates the water passages and promotes urination
Resolves masses
Shared with Jueyinshu Bl-14 and with Baihui Du-20 in the Rising and Falling Hexagram sequence.
Hexagram attributions are my own with an explanation given in the glossary.
Superficial Innervation: Dorsal rami of L1 - L3
Dermatome Segment: L1
Deeper Structures: Dorsal rami of L1
Muscle:
Longissimus thoracis
Pain Referral Pattern:
Inferior to posterior superior iliac spine
Indications:
Low back pain
; Myalgia of long extensors of back
See Montaigue, Dim Mak Locations, Taijiworld.com for explanation of effects.
One consideration of this point and its Ministerial Fire pair, Jueyinshu Bl-14, is that they sit just above the back Shu points for the Heart and Kidneys and so can be argued to represent the connecting pathways between the Heart and Kidneys, the two Shaoyin organs. One role of the Pericardium is to act as an envoy, transmitting the Sovereign Fire from the Heart via the San Jiao, the pathways of water, with the location of these points seeming to suggest this. Jueyinshu Bl-14 being above Xinshu Bl-15 enables it to capture Heat as it rises and then transmit to its pair, Sanjiaoshu Bl-22, which can then flow down to Sanjiaoshu Bl-23.
In Tibetan medicine:
Moxa point (AMNH, Tibetan Medical Paintings)
In Thai massage:
Acupressure point along the Itha (left) and Pingala (right) sen lines running from the navel Shenque Ren-8 to the knee and up the back to the neck and head.
Indicated for back, hip and sacroiliac joint pain/injury/arthritis, erectile dysfunction, gastrointestinal ailments, hypertension, indigestion, infertility, loss of libido, menstruation difficulties, PMS, reproductive system ailments, stomach ache and stress.
(Salguero & Roylance, 2011, Encyclopedia of Thai Massage)
Basic information on location, needle depth, TCM actions, indications and combinations is taken from Deadman et al (2001): A Manual of Acupuncture with additional anatomical information researched by reference to Gray's Anatomy (38th Ed., 1995) unless otherwise referenced. Images were found on acupunctureschoolonline.com and can be traced back to Claudia Focks (2008) Atlas of Acupuncture originally. I cannot claim any credit or rights over them. Other sources should be quoted in the text.
For some of the more unusual terms I have created a glossary here