BL-31 (Shàngliáo, 上髎) — Upper Crevice

Anatomical location

In the first posterior sacral foramen.

Traditional actions

Traditionally regulates the lower burner, benefits the lumbar region, and moves local qi and blood.

Recorded indications

Primary: Reference uses include sacral pain, sciatica, urinary difficulty, menstrual irregularity, and reproductive disorders.

Secondary: Secondary uses include constipation and lower abdominal pain.

How to read this reference

AcuAtlas separates anatomical location, traditional classification, recorded actions, indications, insertion-depth references, and moxibustion notes because these fields answer different study questions. The location statement is the orientation anchor. The classification and actions describe traditional reference categories, while indications summarize how checked educational sources associate the point with established teaching material. They are not a recommendation to select or stimulate the point.

Depth and moxibustion entries are reproduced as bounded reference notes rather than procedural instructions. Individual anatomy, technique, angle, clinical setting, and local professional standards can change what is appropriate. Review the cited documents and supervised training material before using any technical field. The normalized map coordinate is included only to place the point on the matching AcuAtlas body plate; it is not a substitute for palpation or anatomical assessment.