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Alternate names: 鬼垒 guǐ lěi, Ghost Pile; 鬼眼 guǐ yǎn, Ghost Eye; 阴白 yīn bái, Yin White; 足太阴所出 zú tài yīn suǒ chū,

Channel: SP, foot greater yīn (tài yīn) spleen channel

Modern location: An acupoint located a little more than 1 fēn below the base of the nail on the medial side of the big toe.

Classical location: On the inner side of the big toe, the width of a garlic chive leaf from the corner of the nail. From The Great Compendium of Acupuncture and Moxibustion (针灸大成 zhēn jiǔ dà chéng)

Local anatomy: The dorsal digital artery. On the anastomosis of the dorsal digital nerve derived from the superficial peroneal nerve and the plantar digital proprial nerve.

Action: Regulates and manages the blood; warms and supplements the spleen; clears the heart and stabilizes the spirit; warms yáng and returns counterflow.

Modern indications: Abdominal distention; bloody stool; bloody urine; menstrual irregularities; flooding and spotting; mania and withdrawal; profuse dreaming; fright wind.

Classical indications: Panting; cold qì in the abdomen; intestinal heat with fulminant diarrhea; febrile disease with persistent nosebleed; heart vexation, sighing, sorrowfulness; cold in the foot and lower leg; oppressive ghost dreams; persistent menstruation; vomiting of blood (blood ejection); bloody stool and bloody urine; chronic child fright wind.

Needle stimulus: Needling: 0.1 cùn upward oblique insertion. Moxa: 3‒7 cones; pole 5‒20 min.

Needle sensation: Localized pain.

Point groups: Well (jǐng) (wood) point; one of the thirteen ghost points.

Point name meaning:

• 隐 yǐn: hidden, obscure
• 白 bái: white

SP-1 is the first point on the earth channel. Earth engenders metal and thus the beginnings of metal exist subtly in earth and doubly so at the beginning of the earth channel. Because white is the color associated with metal, this point is called Hidden White.

Additionally, the character 隐 (yǐn), which is similar to but not to be confused with 阴 (yīn), the opposite of 阳 (yáng), may point to the fact that the spleen belongs to the tai yīn channel, which is referred to as the yīn within yin. Because 阴 means shadow, cloudy, dark, etc., the yīn within the yīn is doubly obscure; thus 隐. The character 白 (bái), white, can be taken as a reference to the location of the point on the border of the white flesh of the toe. See acupoint names: origins, meanings, and translations.

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