ST-17 (Ru Zhong) Breast Center

What is ST-17 Ru Zhong, and why is it different from every other point?

ST-17 is the centre of the nipple — and our record states, unambiguously, that it is NOT treated. It serves only as a LANDMARK for locating other points on the chest and abdomen. This is the one point in the library that has no therapeutic use recorded at all.

• Not needled. Not moxa’d. Its recorded function is to be a reference marker, nothing more.

Why the classical system numbers a point that is never used. The nipple is one of the most reliable surface landmarks on the front of the body, and a great many chest and abdominal points are located from it: the whole 4-cun mammillary line of the Stomach channel runs through it, and the nipple level fixes the fourth intercostal space for points across several channels. Giving it a point number lets the classical texts refer to it precisely as a reference. ST-17 is a coordinate, not a treatment site.

It is the clearest of a small group. Querying our own records for absolute contraindications — points our data marks as not to be needled at all, setting aside the separate matter of pregnancy cautions — returns a short list: DU-16, DU-20, REN-23, ST-17, ST-21 and two extra points. Most of those are “treat with great care” rather than “never treat”. ST-17 is the only one whose sole recorded role is to be a landmark — verified as unique in the table.

On the name. “Ru Zhong” means Breast Centre — ru is the breast, zhong the centre: the nipple, exactly and literally. Ru is shared with ST-18 Ru Gen (Breast Root), directly below it, which is a treated point.

Source: Sacred Lotus sources & references (channel, action, location and translation records; every needling record queried and ST-17 confirmed the only landmark-only point, and the absolute-contraindication set counted, against our own data), cross-referenced against multiple online sources.

What is ST-17 Ru Zhong used for?

Nothing. Our record states that acupuncture and moxibustion on this point are contraindicated. It has no indications because it has no treatment use — it is reproduced here exactly as our data holds it.

• Acupuncture and moxibustion on this point are contraindicated.

This is not a gap in the record; it is the record. Every other point in this library carries a list of conditions it was classically used for. ST-17 carries a statement that it is not used. Presenting that faithfully — rather than leaving the section blank or, worse, inventing indications from its position — is the accurate thing to do. The nipple is a landmark, and a landmark has no indications.

Where its neighbours’ breast indications sit, since a reader may come here looking for them. The points around the nipple do treat breast conditions: our ST-15 Wu Yi and ST-16 Ying Chuang records carry mastitis, our ST-18 Ru Gen sits at the breast root, and the Kidney chest points KI-23 and KI-24 carry it too. A breast complaint is treated at the points surrounding the nipple, never at the nipple itself.

An honest note, because a reader arriving at “breast” deserves it. ANY NEW BREAST LUMP, SKIN CHANGE, NIPPLE CHANGE OR DISCHARGE REQUIRES PROMPT MEDICAL ASSESSMENT. Breast cancer is common and is far more treatable when found early, and a change at or around the nipple — inversion, eczema-like skin, bloody discharge — is exactly the kind of sign that must be examined rather than watched. Mastitis requires assessment and often antibiotics, and inflammatory breast cancer can resemble it. This is a reference entry about a landmark; it is not clinical advice, and it must never delay assessment of a breast symptom.

Source: Sacred Lotus sources & references (indication and needling records, retained verbatim; the ST-15, ST-16, ST-18, KI-23 and KI-24 breast indications queried from our own data), cross-referenced against multiple online sources.

Where is ST-17 Ru Zhong, and what is it used to locate?

ST-17 is the centre of the nipple, in the fourth intercostal space, four cun out from the midline. Its whole purpose is to be found — so that other points can be found from it.

• At the centre of the nipple
• In the fourth intercostal space, 4 cun lateral to the midline

What ST-17 locates. The nipple is a primary reference for the front of the chest, and our own records use it repeatedly:

• The 4-cun mammillary line — the Stomach channel’s chest points ST-14, ST-15, ST-16 and ST-18 all sit on the vertical line through the nipple, one per intercostal space
• The fourth-intercostal-space level — the nipple in men marks it, which fixes the level for points across several channels; our KI-23 record notes that same reference and its limits

The critical limitation, stated because the classical texts assumed it. The nipple is a reliable landmark only in men, and only in the young. In women, and in older men, the nipple descends and moves laterally, and it cannot be used to fix an intercostal space or a vertical line. The classical descriptions were written with the male body as the reference, and a reader must not apply the nipple landmark where it does not hold — counting ribs directly is the method that works on every body. Our KI-23 and KI-24 records make the same caution.

On the name. “Ru Zhong” — Breast Centre, the nipple exactly.

Source: Sacred Lotus sources & references (location and translation records, retained unchanged; the KI-23, KI-24, ST-14, ST-15, ST-16 and ST-18 records queried from our own data).

Where is ST-17 located?

• A Manual of Acupuncture (p. 142): At the centre of the nipple, in the fourth intercostal space, 4 cun lateral to the midline.
• Chinese Acupuncture and Moxibustion (p. 149): In the fourth intercostal space, in the centre of the nipple, 4 cun lateral to the anterior midline.

How is ST-17 Ru Zhong needled?

It is not. Our own record states that this point serves ONLY as a landmark for locating points on the chest and abdomen — acupuncture and moxibustion on it are contraindicated. This is a neutral record of what our reference data holds. There is nothing here to perform, and this page does not describe a technique because our record documents none.

• Not needled. Our record carries no angle and no depth — because none is intended.
• Not moxa’d. Our record states moxibustion is contraindicated here, unlike almost every other point in the library.
• Function: a reference marker, as set out in the location section.

Why the nipple is not treated. Beyond the general reasons any glandular and richly innervated tissue is avoided, the point’s classical role is simply not therapeutic — it exists in the system as a coordinate. ST-17 is the one point in this library whose needling field describes a locating function rather than an insertion, verified against every record. Reading it as a treatable point would be a category error, which is exactly why our record forecloses it.

What is not claimed. No depth, no angle, no measured margin — because none applies. There is nothing to measure at a point that is not entered.

Source: Sacred Lotus sources & references (needling record, retained verbatim; every needling record queried and ST-17 confirmed the only one whose function is landmark-only), cross-referenced against multiple online sources.

What should a reader know about ST-17 Ru Zhong?

There is no research to report on ST-17, because it is not a treatment. No trial studies the effect of a point that is never needled, and none could. This page documents a reference marker, and that is the whole of its content.

What this page states with confidence. ST-17 is the centre of the nipple. It is not needled and not moxa’d — the only point in this library whose sole recorded role is to be a landmark, verified as unique in the table. It fixes the 4-cun mammillary line and the fourth intercostal space for locating points on several channels — but that landmark holds only in the young male body, and a reader must count ribs directly on anyone else.

The one thing this page most needs to convey to a reader searching “breast”. A breast symptom is not treated at the nipple; and more important than any of the classical detail here: a new breast lump, or any change to the nipple or breast skin, needs prompt medical assessment. Nothing on this page is clinical advice, and nothing on it should slow a reader down in getting a breast symptom examined.

A note on searching for it. “ST 17”, “S 17” and “Ruzhong” searches return protocol trials and unrelated material — and it is worth remembering that a study naming “ST-17” is almost certainly using it as a location reference, not treating it. Any claim attached to this point should be checked against what a study actually did.

Source: Sacred Lotus sources & references (needling, action, indication and location records, retained verbatim; every needling record queried and ST-17 confirmed the only landmark-only point in our own data).