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

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

Classic location: One cùn and five fēn either side of the spine, below the third vertebra. (Zhēn Jiǔ Dà Chéng)

Local anatomy: The medial cutaneous branches of the posterior branches of the intercostal artery and vein. The medial cutaneous branches of the posterior rami of the 3rd and 4th thoracic nerves; deeper, their lateral branches.

Action: Regulates lung qì; supplements taxation and detriment; clears vacuity heat; harmonizes provisioning and blood.

Modern indications: Cough; panting; vomiting of blood (blood ejection); steaming bone tidal heat effusion; night sweating; nasal congestion.

Classic indications: Lung wilting; consumption; fullness in the chest and qì ascent; cough and panting; tension and stiffness in the back; propping fullness in the chest and rib-side; no pleasure in eating; absence of sweating; throat impediment (hóu bì); persistent cough in children.

Needle stimulus: Needling: 0.5 cùn downward oblique insertion. Moxa: 5‒10 cones; pole 10‒15 min.

Needle sensation: Distension and numbness spreading downward and outward.

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

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