San Jiao 3 (SJ 3) Zhong Zhu — Central Islet

This is the Shu-Stream and Wood point of the Triple Burner channel. As the tonification point it benefits the ears, clears heat and relieves disorders along the channel.

San Jiao 3 (SJ 3) Zhong Zhu 中渚 — Central Islet

Location

On the dorsum of the hand, between the fourth and fifth metacarpal bones, in the depression proximal to the fourth metacarpophalangeal joint.

Anatomy

Between the fourth and fifth metacarpals, on the interosseous muscle; the dorsal venous network and the dorsal metacarpal artery; the dorsal branch of the ulnar nerve.

Actions & Functions

  • Benefits the ears
  • Clears heat and benefits the head, eyes and throat
  • Activates the channel

Indications

Tinnitus and deafness, headache, red and painful eyes, sore throat, febrile disease, and pain and contracture of the fingers, hand and arm.

Needling

0.3-0.5 cun, perpendicular insertion.

Moxibustion Suitability

Suitable for moxibustion.

Point Combinations

With SJ-17 and SI-19 for ear disorders; with GB-41 for the Dai Mai and ear.

Classical Text References

The Shu-Stream (Wood) point and tonification point of the Triple Burner.

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.