BL-09 (Yu Zhen) Jade Pillow

What does BL-09 Yu Zhen do?

BL-09 expels wind AND COLD and alleviates pain, and it benefits the nose and eyes. The cold is the distinguishing word: it is the only point in the Bladder scalp run whose recorded action names cold rather than heat.

• Expels wind and cold and alleviates pain — wind-cold, not wind-heat
• Benefits the nose and eyes

Why cold, at this point and not the others. BL-09 sits on the occiput, at the back of the head and the top of the neck — the region classically described as where wind-cold enters the body, which is the same reasoning behind the names of its neighbours GB-20 Feng Chi (Wind Pool), DU-16 Feng Fu (Wind Palace) and BL-12 Feng Men (Wind Gate). Four points named or characterised for wind, all clustered at the back of the head and upper back. Our BL-05 record, at the front of the same run, records clearing heat instead. Front and back of the same channel, opposite thermal emphasis, and both consistent with their positions.

The scalp run ends here. BL-03 through BL-09 are seven points whose actions and indications overlap heavily, all recorded with the same subcutaneous 0.3–0.5 inch insertion; this library discloses that overlap on every one of their records. BL-09 is the last of them, and the one that leaves the line the others share.

Source: Sacred Lotus sources & references (channel, action and location records; the full BL-03 to BL-09 run and the BL-12, DU-16 and GB-20 records queried and compared against our own data), cross-referenced against multiple online sources.

What is BL-09 Yu Zhen used for?

BL-09 is used for headache and neck pain, dizziness, eye pain and nasal obstruction. Our own indication record is reproduced here in full.

• Headache and neck pain
• Dizziness
• Ophthalmalgia (pain in the eye)
• Nasal obstruction

Two entries set it apart from the rest of the run. It is the only one of the seven whose headache entry extends to neck pain — which follows directly from its position on the occiput, where the scalp meets the neck. And ophthalmalgia, eye pain as distinct from blurred vision, is recorded only here; the other scalp points record disturbance of sight rather than pain in the eye. That is a real distinction and worth preserving rather than collapsing into a general eye indication.

An honest note. Eye pain requires medical assessment — it has causes that are sight-threatening and time-critical, and sudden severe eye pain with visual change or a red eye is an emergency. Sudden severe headache with neck pain or stiffness requires urgent assessment. This record documents classical use and should not delay either.

How it is combined. With BL-10 Tian Zhu just below on the neck — the Bladder channel’s Window of Heaven point, and located on the same unusual 1.3-cun lateral measure. With DU-17 Nao Hu on the midline, from which our record measures it. With GB-20 Feng Chi in the hollow below the occiput. With BL-01 and BL-02 at the front for the eyes — the two ends of the channel used together. All held here.

Source: Sacred Lotus sources & references (indication record; the indication lists of all seven scalp points compared, and the BL-01, BL-02, BL-10, DU-17 and GB-20 records queried from our own data), cross-referenced against multiple online sources.

Where is BL-09 Yu Zhen located, and why 1.3 cun?

BL-09 is on the back of the head, 1.3 cun out from DU-17 Nao Hu, which sits in the hollow just above the bony bump at the back of the skull. That 1.3 cun is not a typing slip — it is a genuinely unusual measure, and it is the most notable thing about this location.

• 1.3 cun lateral to DU-17 Nao Hu
• DU-17 lies on the midline directly above the external occipital protuberance, 1.5 cun above DU-16 Feng Fu
• BL-10 Tian Zhu follows below, on the neck

Only three points in this entire library are located at 1.3 cun. Querying our own location records for that measure returns exactly BL-09, BL-10 and SP-14 — and two of the three are these consecutive Bladder points. Nearly every other point is placed at 0.5, 1, 1.5, 2 or 3 cun. A reader who assumes the familiar 1.5-cun line continues onto the occiput will place BL-09 too far out; the run genuinely narrows here, and the narrowing carries on to BL-10.

The external occipital protuberance is the landmark that makes this point reliable. Unlike every other point in the scalp run, BL-09 is measured from a bony feature rather than from the hairline or from the point in front of it. The chain of hairline measurements that runs from BL-03 to BL-08 ends here, and a firm landmark replaces it. That is a genuine advantage: an error accumulated along the chain does not propagate to BL-09.

On the name. “Yu Zhen” means Jade Pillow — the occiput being the part of the head that rests on a pillow, and jade the classical term of value for it. It is one of the more evocative positional names in the system, and it tells you exactly where to look.

Source: Sacred Lotus sources & references (location and translation records, retained unchanged; DU-16, DU-17 and BL-10 positions and every 1.3-cun location in our own data queried and counted).

• A Manual of Acupuncture (p. 262): 1.3 cun lateral to Naohu DU-17 (which is located in the depression superior to the external occipital protuberance, 1.5 cun superior to Fengfu DU-16).
• Chinese Acupuncture and Moxibustion (p. 176): 2.5 cun directly above the midpoint of the posterior hairline and 1.3 cun lateral to the midline, in the depression on the level of the upper border of the external occipital protuberance.

How is BL-09 Yu Zhen needled?

The standard texts record SUBCUTANEOUS insertion — the needle laid along under the skin — to roughly 0.3–0.5 inch, with moxibustion applicable. What follows is a neutral record of what the reference literature documents, not instruction for a reader.

• Angle and depth as recorded: subcutaneous (transverse), 0.3–0.5 inch — the same insertion recorded at every point in the BL-03 to BL-09 run.
• Moxibustion: recorded as applicable here. Across the run our records state it at BL-04, BL-05, BL-07 and BL-09 but not at BL-03, BL-06 or BL-08; nothing is asserted about why.
• Regional anatomy: the occipitalis muscle and the epicranial aponeurosis lie beneath thin skin; the greater occipital nerve and the occipital artery run in the region, becoming superficial as they cross the occiput; the occipital bone lies directly beneath.

Why subcutaneous, and why that is the whole safety story. There is bone immediately under the scalp, so the transverse angle is the only insertion the anatomy permits. This is a low-hazard point in that specific sense: no cavity, no organ, no major vessel.

One regional distinction that matters, and it belongs to the point below this one. The serious hazard in this region is not on the occiput but beneath it: our DU-16 Feng Fu and GB-20 Feng Chi records carry explicit cautions because those points sit in the soft hollow below the occipital bone, where there is no bone to stop a needle and the brainstem lies deep. BL-09 sits above the bone, not below it, and our own record carries no such caution. The distinction is anatomical and exact, and it is stated here so a reader does not import a neighbour’s hazard or, worse, export BL-09’s safety to points where it does not apply.

What is not claimed. No study measuring a safe depth at BL-09 could be located, and none is borrowed. No case report naming BL-09 was located.

Source: Sacred Lotus sources & references (needling record, retained unchanged; the DU-16 and GB-20 cautions queried from our own data and attributed to those points), cross-referenced against multiple online sources; regional anatomy from standard anatomical description.

Is there research on BL-09, and what should a reader know?

No trial isolates BL-09. Where the point appears it is one component of a headache or occipital-pain protocol, and a study that includes a point in a protocol is not evidence about that point.

Occipital headache is where a reader will meet claims near this point, and the protocols in that literature are built around GB-20 and BL-10 rather than BL-09. Evidence about a protocol is not evidence about a point within it, and this record borrows nothing from those trials.

What this page can state with confidence. Four checkable things. BL-09 is measured 1.3 cun lateral to DU-17 — one of only three points in this library using that measure, the others being BL-10 and SP-14. It is the only point in the scalp run located from a bony landmark rather than from the hairline, which ends the accumulated-error chain running from BL-03. It is the only one of the seven whose action names cold, consistent with its position at the back of the head among the wind points. And eye pain, as distinct from blurred vision, is recorded only here within the run.

A note on searching for it. “BL 9”, “UB 9” and “Yuzhen” searches return protocol trials and a large volume of unrelated material — Yuzhen is a common Chinese given name and appears widely in author lists, which makes it an especially poor search term. Our library codes this channel BL- while some sources use UB-. Any claim attached to this point should be checked against what a study actually used.

Source: Sacred Lotus sources & references (action, indication, location and translation records; every 1.3-cun location, the scalp-run comparison, and the BL-10, DU-16, DU-17 and GB-20 records queried and verified against our own data).