Bladder 45 (BL 45) Yi Xi — Yixi

This point, on the back, unbinds the chest, descends rebellious qi and benefits the diaphragm.

Bladder 45 (BL 45) Yi Xi 譩譆 — Yixi

Location

On the back, 3 cun lateral to the lower border of the spinous process of the sixth thoracic vertebra (T6), level with BL-16.

Anatomy

On the trapezius and latissimus dorsi; the posterior intercostal artery; the dorsal rami of the thoracic nerves.

Actions & Functions

  • Unbinds the chest and descends rebellious qi
  • Benefits the diaphragm and clears heat

Indications

Cough and asthma, fullness of the chest, malaria, and shoulder and back pain.

Needling

0.5-0.7 cun, oblique insertion towards the spine.

Moxibustion Suitability

Suitable for moxibustion.

Point Combinations

With BL-17 for diaphragm disorders.

Classical Text References

A point of the outer Bladder line.

Cautions & Contraindications

Deep insertion risks pneumothorax; needle obliquely.

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.