Atlas of Acupuncture

4 Acupuncture Points of the Twelve Primary Channels

Location

1.5 cun lateral to the posterior midline, on the level of the 4th

sacral foramen.

How to find

For more detail on orientation in the lumbar and sacral region,

see ➞3.4.3, 3.4.4. First, find L5. The next palpable structure in

an inferior direction is the most superior sacral spinous process.

Palpate in an inferior direction for three further sacral processes

and locate the 4th sacral foramen in a depression less than 1 cun

lateral to the 4th process. BL-30is located on the level of the 4th

foramen, 1.5 cun lateral to the midline.

Located on the same level are ➞BL-34(over the 4th sacral fora-

men) and ➞BL-54(3 cun lateral to the midline).

Needling

Vertically 0.5–1.5 cun

Actions/Indications

● Strengthens the lower back and the knees

● Eliminates Damp-Heat from the Lower Burner

● Regulates menstruation

BL-30 White Ring Shu BAI HUAN SHU

Sacral foramen 1

Sacral foramen 2

Sacral foramen 3

Sacral foramen 4

Midline

1.5 cun

Level of the

iliac crests

Spinous process L4

Spinous process L5

Sacral

foramina BL-30

23

25

4

3

54

Ex-B-6

(^523)
4
5
2
36
30
1
Bladder channel,
lateral branch
Bladder channel,
medial branch
Du mai
Ex-B-5
Ex-B-8
Ex-B-5
Ex-B-7
Ex-B-11
Iliosacral joints
Sacrum
Ilium
PSIS
Midline
BL-54
Sacral
foramina
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