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Channel: BL, Foot Greater Yáng (tài yáng) Bladder Channel

Modern location: An acupoint located on the lower back, level with the inferior border of the spinous process of the fifth lumbar vertebra, 1.5 cùn lateral to the midline.

Classic location: One cùn and five fēn either side of the spine, below the seventeenth vertebra. The point is found in prostrate posture. (Zhēn Jiǔ Dà Chéng)

Local anatomy: Posterior branches of the lowest lumbar artery and vein. The posterior ramus of the 5th lumbar nerve.

Action: Frees the channels and quickens the network vessels; courses wind and disperses cold; regulates the lower burner.

Modern indications: Abdominal distension; diarrhea; frequent urination; inhibited urination; lumbar pain.

Classic indications: Dispersion-thirst; frequent urination or difficult urination; concretions and conglomerations; vacuity distension; enuresis; wind taxation.

Needle stimulus: Needling: 0.7‒1.0 cùn perpendicular insertion. Moxa: 3‒7 cones; pole 5‒10 min.

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