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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 first lumbar vertebra, 1.5 cùn lateral to the midline.

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

Local anatomy: The posterior rami of the 1st lumbar artery and vein. The lateral cutaneous branch of the posterior ramus of the 10th thoracic nerve; deeper, the lateral branch of the posterior ramus of the 1st lumbar nerve.

Action: Regulates qì and disinhibits water.

Modern indications: Abdominal distension; rumbling intestines; retching and vomiting; diarrhea and dysentery; water swelling; painful stiffness of the back and lumbus.

Classic indications: Dizzy vision; headache; generalized heat effusion; jaundice; inability to get food and drink down; alternating heat effusion and aversion to cold; large accumulations and gatherings in the smaller abdomen.

Needle stimulus: Needling: 0.5 cùn downward oblique insertion. Moxa: 3‒7 cones; pole 20‒30 min.

Needle sensation: Distension and numbness, often spreading downward and outward.

Point groups: Transport point (shù xué) of the triple burner.

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