ST38 Strap Opening

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

ST38 (Tiaokou, “Strap Opening”) is an acupuncture point on the Stomach Meridian. It is located on the anterior aspect of the lower leg, 8 cun inferior to ST35, one finger-breadth lateral to the anterior crest of the tibia. It relaxes sinews and activates the channel, especially for shoulder pain.

Location

On the anterior aspect of the lower leg, 8 cun inferior to ST35, one finger-breadth lateral to the anterior crest of the tibia.

Needling

Perpendicular insertion 1-2 cun.

TCM functions

Relaxes sinews and activates the channel, especially for shoulder pain.

Indications

Pain in the shoulder and arm, paralysis of the lower extremities, gastric pain.

Clinical notes

ST38 is an empirically significant point, best known for its remarkable ability to treat shoulder pain, particularly frozen shoulder (adhesive capsulitis) and rotator cuff injuries. While not a command point, its distal location provides a powerful and often immediate effect on the shoulder when needled with movement. It also relaxes sinews and activates the channel in the lower leg. It is almost exclusively used for its unique effect on shoulder pain, often in conjunction with local shoulder points.

On the Stomach channel

ST38 is one of 45 points on the Stomach Meridian. Nearby points:

Frequently asked questions

Where is ST38 located?

ST38 (Tiaokou) is located on the anterior aspect of the lower leg, 8 cun inferior to ST35, one finger-breadth lateral to the anterior crest of the tibia.

What is ST38 used for?

ST38 relaxes sinews and activates the channel, especially for shoulder pain. Common clinical indications include pain in the shoulder and arm, paralysis of the lower extremities, gastric pain.

How is ST38 needled?

Perpendicular insertion 1-2 cun.

Which meridian is ST38 on?

ST38 is a point on the Stomach Meridian (Zú Yángmíng Wèijīng).

Interactive body mapConditions & evidenceFind an acupuncturistTCM glossary
⚠️ 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.