Bladder

BL27

小肠俞 · Xiaochangshu

Small Intestine Shu

Sacral point, small intestine shu.

Back-shu of the Small Intestine

Use caution

System

Channel: Bladder (BL)
Element: Water
Yin or yang: yang
Organ system: Bladder
Region: Back
Limb rule: Foot Taiyang

Open the Bladder page

Where it is

On the sacrum, about two finger-widths lateral to the midline, level with the first sacral foramen — just below the belt line, in the dimples’ neighborhood.

Nearby: Sacrum. Bone is shallow. Press the soft tissue, not the bone edge.

Traditionally said to

Back-shu of the Small Intestine. Taught for lower abdominal patterns and sacral ache.

What people look up

Digestion Pain relief Women’s health

Acupressure

Broad pressure on the sacral muscle, 30–45 seconds.

When not to press: Skip in pregnancy unless guided, and skip sharp sacral pain.

About 30–90 seconds is the usual window, unless the step above is shorter. Stop if pain, dizziness, or anything unusual shows up.

Licensed practice only

Needle depth, angle, electroacupuncture

Textbook language for students. Not instructions. A cun is a body-inch on that person, not a ruler inch. Do not needle yourself.

Depth

Common textbook range: about 0.5–1 cun perpendicular. The sacrum is shallow; depth is into the foramen region only with training.

Angle

Perpendicular.

Electroacupuncture

Introductory charts rarely assign a standard electroacupuncture setting here. Clinics that use current choose frequency and intensity for that person. No milliamp figure is given, because copying one would be misleading.