Acupoint · SP-9

Yinlingquan

阴陵泉 yīn líng quán also known as Yin Mound Spring

4Actions
3Skin uses
2Classical
Spleen Meridian (Foot Taiyin)Lower leg, medial below the kneeResolves DampnessOpens the water passages and benefits urinationRegulates the Spleen

What Yinlingquan does

Yinlingquan sits below the inner knee, at the junction of the shin and the tibial head. Its work is draining Dampness from the lower body, whether that Dampness is cold or hot.

Actions

  • Resolves Dampness
  • Opens the water passages and benefits urination
  • Regulates the Spleen
  • Drains Damp-Heat from the lower burner

Location

On the lower border of the medial condyle of the tibia, in the depression between the back edge of the tibia and the gastrocnemius muscle.

How to find it

Bend the knee and run a finger up the back edge of the shin bone toward the knee. The point is in the hollow where the shaft meets the head of the tibia, just behind the bone. It is typically tender.

Deqi

Local soreness and distension, often deep and heavy, sometimes spreading down the inner leg.

A cun is a proportional body measurement, not a fixed length: one cun is about the width of the thumb at the knuckle, 1.5 cun about two finger widths, and 3 cun about the width of four fingers. On an average adult one cun is roughly one inch, but it scales with the person, which is why the texts measure in cun rather than centimetres.


Technique

Needling

Angle: 90 degrees (perpendicular) Depth: 1.0 to 2.0 cun Direction: 1 to 1.5 cun vertically, along the posterior border of the tibia

Moxibustion

Ten to twenty minutes, used when the Dampness is cold rather than hot.

Cupping

Used over the point and the surrounding channel for dampness and swelling.

Gua sha

Gua sha along the inner leg for dampness with heaviness.

Bleeding

Questionable at this point and not part of routine practice.


Skin uses

  • Weeping, oozing eczema
  • Skin lesions with swelling and heaviness
  • Skin that is worse in humid weather

Point classifications

ClassificationValue
Five phaseWater (Shui)
Transporting typeSea-He point
Mother-child roleChild, therefore reducing on this channel
Main roleDrains Dampness from the lower burner

Classical record

Yinlingquan and Shuifen eliminate abdominal oedema.

Bai Zheng Fu (百症赋, Ode of a Hundred Symptoms).

For heat disease with acute pain around the umbilicus and fullness in the chest and hypochondrium, treat Yongquan KI-1 and Yinlingquan.

Ling Shu (灵枢), chapter on heat diseases.

Safety

Who should treat this point

Acupuncture and moxibustion are practitioner procedures; this page is educational.

Caution

The great saphenous vein lies in front of the point and the tibial nerve in the deeper layer, so needling avoids aggressive manipulation, especially where there are varicose veins. Tenderness at the point is common and diagnostic rather than a reason to avoid it.

Deficiency and constitution

Draining a depleted person makes them weaker. In deficiency patterns the point is used gently and always with tonifying points.

Before treatment

Educational reference only. Oedema of both legs, or a weeping lesion that spreads rapidly, needs medical assessment.


Modern evidence and safety

Traditional use

General references for acupuncture safety and skin evidence. They are not specific to this point, and they are not a claim that needling it treats any condition.

Evidence note

No controlled trial of this treatment in skin conditions was identified for this entry. What is described here rests on the classical and later materia medica record and on traditional clinical use, not on controlled trial evidence, and it is not a prediction of benefit. Where skin-specific research does exist it is linked above.

Common questions

How is it used for skin?

For Dampness: the oozing, swelling, heaviness and crusting that comes with it. Draining the point reduces what the skin is trying to discharge.

Damp-Cold or Damp-Heat?

Both. The combination and the technique change: moxa and warming points for cold, cooling points such as Quchi for heat.

Why is it tender?

Tenderness is common in dampness patterns and is used as a locating aid; it usually eases as the pattern improves.