BL-49 (Yi She) Reflection Abode

What does BL-49 Yi She do?

BL-49 is the outer-line point for the SPLEEN’s spirit — the yi, usually translated as intellect, thought or reflection. It sits on the second Bladder line at T11, level with BL-20 Pi Shu, the Back-Shu point of the Spleen, and its name says what that pairing is for: Reflection Abode.

• Clears damp-heat — the Spleen’s classical relationship with dampness
• Regulates the Spleen and Stomach — the organ action at this level of the back

The five spirit points of the outer line, verified against our own data. Each sits three cun from the midline, level with the inner-line Back-Shu point of a yin organ, and each is named for that organ’s spirit:

• BL-42 Po Hu — Po Door, level with BL-13, Back-Shu of the Lungs
• BL-44 Shen Tang — Spirit Hall, level with BL-15, Back-Shu of the Heart
• BL-47 Hun Men — Hun Gate, level with BL-18, Back-Shu of the Liver
• BL-49 Yi She — Reflection Abode, level with BL-20, Back-Shu of the Spleen — this point
• BL-52 Zhi Shi — Will Chamber, level with BL-23, Back-Shu of the Kidneys

The yi is the least familiar of the five spirits to a Western reader, and it is worth stating precisely: it is the faculty of thought, study, concentration and rumination, attributed to the Spleen. The classical claim is that overthinking damages the Spleen and that a weak Spleen produces circular, unproductive thought — a two-way relationship rather than a one-way cause. That is presented here as the traditional rationale, not as a mechanism.

Source: Sacred Lotus sources & references (channel, action and location records; the five spirit points and their inner-line Back-Shu levels queried and verified against our own data), cross-referenced against multiple online sources.

What is BL-49 Yi She used for?

BL-49 is used for digestive complaints — distension, rumbling, vomiting, diarrhoea — and for difficulty swallowing. Our own indication record is reproduced here in full.

• Abdominal distension
• Rumbling in the abdomen (borborygmus)
• Vomiting
• Diarrhoea
• Difficulty in swallowing

Note what is absent, and it is the same observation as at BL-44. The list is entirely digestive; it carries no mental or emotional indication, despite the point being named for the intellect. The spirit association comes from the name and the classical system, while our recorded indications are physical. This library’s standard is to report both and let a reader see which is which, rather than importing indications from the theory into a record that does not hold them.

Difficulty swallowing is the outlier and worth flagging: it is a symptom that requires medical assessment, since persistent dysphagia can indicate serious pathology. This record describes classical use and is not a suggestion that it be managed without diagnosis.

How it is combined. With BL-20 Pi Shu at the same level on the inner line — the classical inner-and-outer pairing. With LIV-13 Zhang Men, the Front-Mu point of the Spleen and the Hui-Meeting point of the Zang, in the front-and-back pairing. With ST-36 Zu San Li and SP-06 San Yin Jiao distally. All held here.

Source: Sacred Lotus sources & references (indication record; BL-20, LIV-13, ST-36 and SP-06 classifications queried from our own data), cross-referenced against multiple online sources.

Where is BL-49 Yi She located?

BL-49 is on the back, three cun out from the midline, level with the lower edge of the eleventh thoracic spinous process — the same level as BL-20 Pi Shu.

• 3 cun lateral to the midline, level with T11
• Level with BL-20 Pi Shu on the inner line at 1.5 cun
• Counted from the vertebrae; the outer line has no palpable landmark of its own

T11 is the lower thoracic transition. BL-49 sits near the bottom of the ribcage, where the thoracic considerations of the upper back begin to give way to the lumbar ones below — which matters for how the point’s anatomy is described. Our BL-52 Zhi Shi record, at L2 on the same line, deals with the kidney region instead; our BL-44 record, at T5, is squarely thoracic.

On the name. “Yi She” — Reflection Abode, or Abode of Thought. The five spirit points are named door, hall, gate, abode and chamber; each is a dwelling for the spirit of the organ whose Back-Shu point lies beside it. It is one of the more coherent naming systems in acupuncture, and our own records preserve it intact.

Source: Sacred Lotus sources & references (location and translation records, retained unchanged; BL-20, BL-44 and BL-52 levels queried from our own data).

• A Manual of Acupuncture (p. 308): 3 cun lateral to the midline, level with the lower border of the spinous process of the eleventh thoracic vertebra (T11) and level with Pishu BL-20.
• Chinese Acupuncture and Moxibustion (p. 186-187): 3 cun lateral to Jizhong (DU-6), at the level of the lower border of the spinous process of the eleventh thoracic vertebra.

How is BL-49 Yi She needled?

The standard texts record oblique insertion 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: oblique, 0.3–0.5 inch — the shallow oblique angle is characteristic of the thoracic back points and exists for the same reason at all of them.
• Moxibustion: recorded as applicable.
• Regional anatomy: latissimus dorsi and the erector spinae group overlie the point; the eleventh rib and the lower intercostal space lie deep, with the pleural recess above and the kidney’s upper pole in the region below and deeper.

What is NOT claimed here. A paediatric chest-CT study measured skin-to-pleura safe depth at 23 named points, and this library uses its figures on the points it covers — but its outer-line coverage runs BL-41 to BL-46 and stops there. BL-49 is not among the 23. Verified. No figure from it is borrowed for this point, and none is invented. Likewise the MRI kidney-region safe-depth study measured BL-21, BL-22, BL-23, BL-50, BL-51 and BL-52 — not BL-49.

Hazard, stated proportionately. This is a thoracic paravertebral point at T11 and the general considerations of that region apply; but no study has measured them here, and this record says so rather than substituting a neighbour’s number. No case report naming BL-49 as the site of an injury was located, and none is asserted.

Source: Sacred Lotus sources & references (needling record, retained unchanged); the point lists of PMID 26922245 / PMC4769822 and the kidney-region MRI study queried from our own data and confirmed NOT to include BL-49.

Is there research on BL-49, and what should a reader know?

No trial isolates BL-49. Where the point appears it is one component of a digestive or back protocol, and a study that includes a point in a protocol is not evidence about that point.

What this page is genuinely for. The outer-line spirit system is the most legible piece of classical theory this library holds — five points, five spirits, each beside its organ’s Back-Shu point, each named for what it houses — and every element of it checks out against our own records: the levels, the pairings and the names. A reader who understands BL-49’s position understands the other four.

And an honest limit, stated the same way on BL-44. Our recorded indications for BL-49 are digestive, not mental. The connection to thought and rumination is carried by the name and the tradition, not by the indication list. Both are reported here; neither is allowed to stand in for the other.

A note on searching for it. “BL 49” and “Yishe” searches return protocol trials and unrelated material matched on the code or on a surname — Yishe is a personal name. This library has discarded comparable matches throughout, including a city, a herb, a lizard genomics paper and the ordinary Chinese term for pension provision. Any claim attached to this point should be checked against what a study actually used.

Source: Sacred Lotus sources & references (classification, indication and location records; the five spirit points and the two safe-depth studies' point lists queried from our own data).