BL-40 - Middle of the Crook

委中 - Wěi zhōng

Point Region: Knee

BL

Bladder Meridian

足太阳膀胱经 - Zú Tàiyáng Pángguāng Jīng

Location & How to Find

Anatomical Location: At the back of the knee, at the midpoint of the crease behind the knee.

How to Locate:

  1. Find the crease behind your knee
  2. The point is at its middle
BL-40 (Middle of the Crook) acupressure point location: At the back of the knee, at the midpoint of the crease behind the knee.

How to Apply Pressure

Sit with the knee slightly bent so the crease behind it softens, and press lightly at the middle of the crease. Large blood vessels run here, so never press deeply, and skip the point if you have a bleeding disorder.

Traditional Indications

In TCM, this point is traditionally used for:

  • Lumbar pain
  • Hip stiffness
  • Knee spasms
  • Lower back disorders

Related Health Concerns

Knee PainLower Back PainSciatica

Select a point to see its location, how to find it, and its traditional uses.

Traditionally combined with:

BL-40 + BL-23
Kidney Shu
BL-40 + GB-34
Yang Mound Spring

Important Precautions

Avoid this point with:

  • Avoid deep pressure over the blood vessels behind the knee
  • Caution in bleeding disorders