BL-34 - Lower Crevice
下髎 - Xià liáo
Point Region: Lower back
BL-34 Xialiao, meaning 'Lower Crevice,' is the final of the four sacral points, and a powerful point for strengthening the sacrum and regulating the lower burner's functions. Located at the bottom of the sacral foramen, it is a master point for the health of the lower back, legs, and pelvic region.
Think of Xialiao as a point that provides a solid foundation for the entire body. It's especially useful for relieving lower back pain, sciatica, and pain in the legs and feet. By strengthening the sacrum, it helps to restore a sense of stability and support to the body's core.
By regulating the functions of the lower burner, BL-34 helps to alleviate a wide range of issues, from urinary problems to hemorrhoids. It's a point that reminds us that our ability to stand tall and move forward in life is rooted in a strong and stable foundation.
Location & How to Find
Anatomical Location: Over the fourth posterior sacral foramen (S4).
How to Locate:
- Locate the fourth and lowest small depression in the center of your tailbone
- Gently press into this depression with your fingertip - this is BL-34

Primary Functions
Urinary & Kidney System
- Treats urinary disorders and incontinence
- Supports reproductive health
- Regulates menstrual function
Digestive System
- Treats diarrhea and bowel disorders
- Supports lower digestive function
Musculoskeletal System
- Relieves coccyx and tailbone pain
- Treats pelvic floor dysfunction
Clinical Applications
Primary Indications
- Vaginal discharge
- Painful menstruation
- Constipation
- Urinary difficulty
- Lower back pain
- Pelvic disorders
Related Health Concerns
Common Conditions:
Related Acupoints
Select a point to learn about its location, primary functions, clinical applications, and protocols.
BL-34 Protocols
N/A
Important Precautions
- Contraindicated during pregnancy