ST31 Thigh Gate

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

ST31 (Biguan, “Thigh Gate”) is an acupuncture point on the Stomach Meridian. It is located on the anterior aspect of the thigh, directly inferior to the anterior superior iliac spine, at the level of the perineum, in the sartorius muscle. It dispels wind-damp and strengthens the leg.

Location

On the anterior aspect of the thigh, directly inferior to the anterior superior iliac spine, at the level of the perineum, in the sartorius muscle.

Needling

Perpendicular insertion 1-2 cun.

TCM functions

Dispels wind-damp and strengthens the leg.

Indications

Pain in the thigh and knee, muscular atrophy, paralysis.

Clinical notes

ST31, 'Thigh Gate,' is a primary point for disorders of the hip and thigh, particularly pain, weakness, and atrophy of the quadriceps. It excels at dispelling wind-damp and strengthening the leg, making it invaluable for conditions like sciatica, hemiplegia, and Bi syndrome affecting the lower limb. It is often used in conjunction with other local points for comprehensive leg treatment.

On the Stomach channel

ST31 is one of 45 points on the Stomach Meridian. Nearby points:

Frequently asked questions

Where is ST31 located?

ST31 (Biguan) is located on the anterior aspect of the thigh, directly inferior to the anterior superior iliac spine, at the level of the perineum, in the sartorius muscle.

What is ST31 used for?

ST31 dispels wind-damp and strengthens the leg. Common clinical indications include pain in the thigh and knee, muscular atrophy, paralysis.

How is ST31 needled?

Perpendicular insertion 1-2 cun.

Which meridian is ST31 on?

ST31 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.