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BL-30 Baihuanshu (白環俞) — White Ring Shu
Depth
00.8–1.2 cun3.0
Perpendicular insertion
Precautions
No standard contraindications.
Location (classical)
On the sacrum, 1.5 cun lateral to the posterior midline, at the level of the fourth posterior sacral foramen.
How to find it (practical)
In ventral decubitus, locate the point below the fourth sacral vertebra, 1.5 cun lateral to the posterior midline.
Anatomy
Gluteus maximus muscle.
Needling
Perpendicular insertion, 0.8–1.2 cun.
Etymology
Bai (白), white; Huan (环), ring; Shu (俞), point. White Ring point.
CLASSICAL SOURCEJia Yi Jing
Clinical Relations
Adjacent Points on the Meridian