ST17 Ruzhong

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

ST17 (Ruzhong, “Ruzhong”) is an acupuncture point on the Stomach Meridian. Located at the center of the nipple, in the fourth intercostal space, 4 cun lateral to the anterior midline. It this point is primarily used as an anatomical landmark and is not typically manipulated due to its sensitive location. The classics note it is where the Stomach channel's qi manifests.

Location

Located at the center of the nipple, in the fourth intercostal space, 4 cun lateral to the anterior midline.

Needling

This point is not needled in modern practice. It serves as a crucial anatomical landmark for locating other points on the chest and abdomen.

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TCM functions

This point is primarily used as an anatomical landmark and is not typically manipulated due to its sensitive location. The classics note it is where the Stomach channel's qi manifests..

Clinical notes

Ruzhong is not used for treatment but is an essential landmark for locating all other points on the chest. It establishes the vertical line 4 cun lateral to the midline, upon which points ST13 through ST18 are situated. The extensive classical discussion on mastitis and breast abscesses under this point's entry in the Zhen Jiu Ju Ying highlights the diagnostic importance of the breast region in traditional medicine, linking it to Liver qi stagnation and Stomach heat.

On the Stomach channel

ST17 is one of 45 points on the Stomach Meridian. Nearby points:

ST13ST14ST15ST16ST18ST19ST20ST21

Frequently asked questions

Where is ST17 located?

Located at the center of the nipple, in the fourth intercostal space, 4 cun lateral to the anterior midline.

What is ST17 used for?

ST17 this point is primarily used as an anatomical landmark and is not typically manipulated due to its sensitive location. The classics note it is where the Stomach channel's qi manifests.

How is ST17 needled?

This point is not needled in modern practice. It serves as a crucial anatomical landmark for locating other points on the chest and abdomen. Caution: Overlies the thoracic cavity — risk of PNEUMOTHORAX. Needle obliquely or transversely, never deeply or perpendicularly toward the chest wall. The classical texts are unanimous and emphatic in their warnings against needling or applying moxibustion to this point. The Jia Yi Jing and Zi Sheng Jing warn that improper treatment can lead to the formation of an erosive sore. If this sore contains clear fluid or pus and blood, it is treatable; however, if a fleshy growth appears or the sore becomes erosive, it is considered a fatal sign.

Which meridian is ST17 on?

ST17 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.