Back-Shu of the San Jiao · Fire · Bladder inner line
BL-22Sān Jiāo Shū 三焦俞
Back-Shu of the San Jiao 三焦. Front-Mù pair: REN-5 Shí Mén.
Spinal level
L1
1.5 cùn lateral to the spine
Element
Fire
Front-Mù pair
REN-5 Shí Mén
Location
1.5 cùn lateral to the lower border of the spinous process of L1.
Actions
- Regulates the Sān Jiāo and water passages
- Resolves oedema and promotes urination
- Strengthens the lumbar region
Indications
Oedema, dysuria, ascites, borborygmus, low back pain.
Regulates the Water passages across all three burners.
Needling technique
Perpendicular 0.8–1.2 cùn (below the ribs — safer window than the thoracic Shu points).
Moxibustion
Useful for cold-type oedema and Lower Jiāo cold with dysuria.
Cautions
Kidney lies deep — do not exceed 1.2 cùn in thin patients.
Classical pairings
- SJ-4 Yáng Chí — Yuán-source of the Sān Jiāo
- REN-5 Shí Mén — Front-Mù of the Sān Jiāo
- SP-9 Yīn Líng Quán — resolves Damp and promotes urination
Open in the point database
View live location diagrams, additional research citations and full needling metadata for BL-22.
Open BL-22 in the point database →Educational reference for licensed practitioners and students. Not medical advice — always correlate with a full TCM assessment and Western clinical judgement.