Bladder 30 (BL 30) Bai Huan Shu — White Ring Shu

This point, on the sacrum, benefits the lower burner and genitals and strengthens the lumbosacral region.

Bladder 30 (BL 30) Bai Huan Shu 白環俞 — White Ring Shu

Location

On the sacrum, 1.5 cun lateral to the midline, level with the fourth posterior sacral foramen (S4).

Anatomy

On the gluteus maximus; the inferior gluteal and lateral sacral arteries; the inferior gluteal nerve.

Actions & Functions

  • Benefits the lower burner and the genitals
  • Regulates menstruation and stops vaginal discharge
  • Strengthens the lumbosacral region

Indications

Abnormal vaginal discharge, irregular menstruation, seminal emission, lumbosacral pain, and hernia.

Needling

0.8-1.2 cun, perpendicular insertion.

Moxibustion Suitability

Suitable for moxibustion.

Point Combinations

With BL-31 to BL-34 for lower-burner and genital disorders.

Classical Text References

A point of the Bladder channel on the sacrum.

Cautions & Contraindications

None specific.

Latest Research

Latest peer-reviewed research on this point will be summarised here, with citations linked to PubMed, via our research integration.

About Attilio

Doctor of Chinese medicine, acupuncture expert and author of My Fertility Guide and My Pregnancy Guide.

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PubMed research

Acupuncture Shows Sustained Benefits for Chronic Daily Headache Prevention in Adults, Meta-Analysis Finds

Research summary (Acupuncture): Utility of Acupuncture Therapy for Adult Chronic Daily Headache Prophylaxis: A Systematic Review and Meta-Analysis. - Medical science monitor : international medical journal of experimental and clinical research, 2026.