Baihuanshu (BL 30)

Baihuan = White ring

Location of Baihuanshu

Baihuanshu is located 1.5 cun from the posterior midline, at the level of the 4th^⁠ sacral foramen (S4).

It lies next to the greater sciatic notch, where the sciatic nerve exits.

Therapeutic functions of Baihuanshu

• Particularly useful because it lies outside the sacrum, especially for sciatica ;
• Baihuanshu is used as a local point for lumbosacral problems ;
• Bladder and gynecological problems (urinary and genital).