Location & How to Find

Anatomical Location: 1.5 cun lateral to the fourth posterior sacral foramen (S4).

How to Locate:

  1. Locate the fourth small depression in your tailbone, the lowest one
  2. Move about one and a half finger-widths to the side from the center line
  3. Press to find a tender spot - this is BL-30
Location illustration for 1.5 cun lateral to the fourth posterior sacral foramen (S4).

Primary Functions

Urinary & Kidney System

  • Treats reproductive disorders
  • Supports reproductive health
  • Regulates menstrual function

Musculoskeletal System

  • Relieves lower back and hip pain
  • Treats pelvic and sacral disorders

Digestive System

  • Treats lower abdominal disorders
  • Supports pelvic organ function

Select a point to learn about its location, primary functions, clinical applications, and protocols.

BL-30 Protocols

N/A

Important Precautions

  • Caution during pregnancy