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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.

Classical location: One cùn and five fēn either side of the spine, below the seventeenth vertebra. The point is found in prostrate posture. From The Great Compendium of Acupuncture and Moxibustion (针灸大成 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.

Classical 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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