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Alternate names: 颡大 sǎng dà, Forehead Large

Channel: ST, Foot Yáng Brightness (yáng míng) Stomach Channel

Modern location: An acupoint located on the superior aspect of the head, in a depression 0.5 cùn within the anterior hairline at the ``corner of the forehead.''

Classic location: At the corners of the forehead within the hairline, one cùn and five fēn to the side of Root Spirit (GB-13), four cùn and five fēn from Spirit Court (GV-24). (Zhēn Jiǔ Dà Chéng)

Local anatomy: The frontal branches of the superficial temporal artery and vein. The branch of the auriculotemporal nerve and temporal branch of the facial nerve.

Action: Dispels wind and discharges fire; relieves pain; clears the head and brightens the eyes.

Modern indications: Headache; dizzy vision; eye pain; tearing; twitching of the eyelids.

Classic indications: Panting counterflow; vexation and fullness; splitting headache; eyes painful as if fit to burst from their sockets.

Needle stimulus: Needling: 0.5‒1.0 cùn upward or downward transverse insertion. Moxa: pole 5‒10 min.

Point groups: Intersection point (jiāo huì xué) of the stomach and gallbladder channels.

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