Spleen 9 (SP 9) Yin Ling Quan — Yin Mound Spring

This is the He-Sea and Water point of the Spleen channel and the principal point for resolving dampness and benefiting urination.

Spleen 9 (SP 9) Yin Ling Quan 陰陵泉 — Yin Mound Spring

Location

On the medial aspect of the lower leg, in the depression between the posterior border of the medial condyle of the tibia and the gastrocnemius muscle.

Anatomy

Posterior and inferior to the medial condyle of the tibia, on the gastrocnemius; the great saphenous vein and the medial inferior genicular artery; the medial crural cutaneous nerve and the tibial nerve.

Actions & Functions

  • Resolves dampness and damp-heat
  • Benefits urination and the lower burner
  • Strengthens the Spleen and regulates the water passages

Indications

Oedema, abdominal distension and fullness, difficult or painful urination, diarrhoea, abnormal vaginal discharge, jaundice, and pain of the knee.

Needling

1.0-1.5 cun, perpendicular insertion.

Moxibustion Suitability

Suitable for moxibustion.

Point Combinations

With SP-6 to resolve dampness; with REN-9 and ST-28 for oedema.

Classical Text References

The He-Sea (Water) point of the Spleen, the chief point for damp accumulation.

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.