REN9 Water Divide

Reviewed by · Licensed Acupuncturist & TCM Physician · Last reviewed June 2026

REN9 (Shuifen, “Water Divide”) is an acupuncture point on the Conception Vessel Meridian. It is located on the anterior midline of the abdomen, 1 cun superior to the umbilicus. It regulates water metabolism and reduces edema.

Location

On the anterior midline of the abdomen, 1 cun superior to the umbilicus.

Needling

Perpendicular insertion 0.8-1.5 cun. Caution: Peritoneal cavity.

TCM functions

Regulates water metabolism and reduces edema.

Indications

Abdominal pain, borborygmus, edema, anuria, diarrhea.

Clinical notes

Ren 9, Shuifen, is a crucial point for managing all forms of edema, particularly those due to water retention and dampness, by regulating the Spleen and Kidney's role in water metabolism. Its name, 'Water Divide,' reflects its ability to separate clear from turbid, making it effective for abdominal distention with borborygmus and diarrhea. It is often paired with SP9 to powerfully drain dampness and reduce swelling.

On the Conception Vessel channel

REN9 is one of 24 points on the Conception Vessel Meridian. Nearby points:

Frequently asked questions

Where is REN9 located?

REN9 (Shuifen) is located on the anterior midline of the abdomen, 1 cun superior to the umbilicus.

What is REN9 used for?

REN9 regulates water metabolism and reduces edema. Common clinical indications include abdominal pain, borborygmus, edema, anuria, diarrhea.

How is REN9 needled?

Perpendicular insertion 0.8-1.5 cun. Caution: Peritoneal cavity.

Which meridian is REN9 on?

REN9 is a point on the Conception Vessel Meridian (Rèn Mài).

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⚠️ This page is for general education and is not medical advice. Acupuncture is a traditional practice; evidence varies by condition and study quality, and individual results differ. It does not replace diagnosis or treatment by a licensed professional. Always consult a qualified acupuncturist or physician.