ST33 Yin Market

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

ST33 (Yinshi, “Yin Market”) is an acupuncture point on the Stomach Meridian. It is located on the anterior aspect of the thigh, 3 cun superior to the superior border of the patella, on the line connecting the anterior superior iliac spine and the lateral border of the patella. It dispels wind-damp and relaxes the sinews.

Location

On the anterior aspect of the thigh, 3 cun superior to the superior border of the patella, on the line connecting the anterior superior iliac spine and the lateral border of the patella.

Needling

Perpendicular insertion 1-1.5 cun.

TCM functions

Dispels wind-damp and relaxes the sinews.

Indications

Pain and numbness of the knee and thigh, muscular atrophy.

Clinical notes

ST33, 'Yin Market,' is highly effective for acute and chronic knee pain, particularly when exacerbated by cold or dampness. It strongly dispels wind-damp and relaxes the sinews, making it a key point for Bi syndrome of the knee, inability to flex and extend the knee, and atrophy of the leg muscles. It is often combined with ST34 and SP10 for comprehensive knee treatment.

On the Stomach channel

ST33 is one of 45 points on the Stomach Meridian. Nearby points:

Frequently asked questions

Where is ST33 located?

ST33 (Yinshi) is located on the anterior aspect of the thigh, 3 cun superior to the superior border of the patella, on the line connecting the anterior superior iliac spine and the lateral border of the patella.

What is ST33 used for?

ST33 dispels wind-damp and relaxes the sinews. Common clinical indications include pain and numbness of the knee and thigh, muscular atrophy.

How is ST33 needled?

Perpendicular insertion 1-1.5 cun.

Which meridian is ST33 on?

ST33 is a point on the Stomach Meridian (Zú Yángmíng Wèijīng).

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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.