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Alternate names: 兑骨 duì gǔ, Protuberant Bone

Channel: HT, Hand Lesser Yīn (shào yīn) Heart Channel

Modern location: An acupoint located on the palm, between the fourth and fifth metacarpal bones, proximal to the metacarpophalangeal (mcp) joints.

Classic location: Behind the base joint of the little finger, in the gap between the bones, level with Palace of Toil (PC-8). (Zhēn Jiǔ Dà Chéng)

Local anatomy: The common palmar digital artery and vein. The 4th common palmar digital nerve derived from the ulnar nerve.

Action: Quiets the heart and regulates the spirit.

Modern indications: Heart palpitation; chest pain; inhibited urination; enuresis; painful itchy genitals; hypertonicity of the fingers.

Classic indications: Genital itch; vexation and fullness; scantness of breath; sorrow, fear, and fearfulness of people.

Needle stimulus: Needling: 0.3‒0.5 cùn perpendicular insertion. Moxa: 3 cones; pole 5‒10 min.

Point groups: Spring (yíng) (fire) point.

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