Conception Vessel 1 (REN 1) Hui Yin — Meeting of Yin

This is the first point of the Conception Vessel and the meeting of the Ren, Du and Chong vessels at the perineum. It benefits the lower orifices, regulates the lower burner and is used in resuscitation.

Conception Vessel 1 (REN 1) Hui Yin 會陰 — Meeting of Yin

Location

In the perineum, between the anus and the posterior border of the scrotum in men, or between the anus and the posterior labial commissure in women.

Anatomy

In the centre of the perineum; the perineal artery and vein; the perineal branch of the pudendal nerve.

Actions & Functions

  • Benefits the lower orifices (genitals and anus)
  • Regulates the lower burner and the anterior and posterior yin
  • Restores consciousness (drowning, collapse)
  • Calms the spirit

Indications

Genital pain, itching and swelling, retention of urine, haemorrhoids and rectal prolapse, irregular menstruation, and resuscitation after drowning.

Needling

0.5-1.0 cun, perpendicular insertion.

Moxibustion Suitability

Suitable for moxibustion.

Point Combinations

With DU-20 for prolapse; with DU-1 for haemorrhoids.

Classical Text References

The meeting of the Ren, Du and Chong vessels (which all arise in this region).

Cautions & Contraindications

Caution and full consent given the location; contraindicated in pregnancy.

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

Traditional Chinese Medicine Improves Nutritional Status in Maintenance Haemodialysis Patients, Meta-Analysis Finds

Research summary (Traditional Chinese Medicine): Efficacy of traditional Chinese medicine in improving nutritional status among Chinese maintenance hemodialysis patients: a meta-analysis of - Frontiers in nutrition, 2026.