Traditionally used for
- Bowel health
- Nerves & recovery
- Pain & joints
Location
On the back of the knee, 1 cun above BL39, on the medial side of the tendon of biceps femoris.
How to locate: With the knee slightly flexed against resistance, the biceps femoris tendon stands out at the lateral side of the popliteal fossa. The point is on the medial edge of that tendon, 1 cun above BL39 and the popliteal crease.
Distances are in cun, a proportional unit — how to measure.
3D view
3D view not available for this point: its position on the 3D model couldn't be checked against its location text, so it is not shown. The 2D maps above show it.
Needling
Cited needling
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Perpendicular insertionDepth 1–1.5 cunskindeeper
Depths describe average adult habitus in the cited population, never a single safe number for the patient in front of you. Palpate and adjust.
Sources (1)
- Deadman P, Al-Khafaji M, Baker K. A Manual of Acupuncture. Hove: Journal of Chinese Medicine Publications; 1998 — p. 297 Supports: techniques (names this point)
Site notes · not cited
Functions
- Relaxes the sinews and activates the channel and luo vessels
- Clears heat, particularly from the Small Intestine
Indications
Balance Method partners
Under Dr. Tan's six systems, BL38 at the back of knee balances these channels at the regions its segment images.
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1. Same Chinese nameSmall Intestine channelElbow · Mirror (arm ↔ leg)Elbow · Reversed mirrorUpper abdomen, Lower back · Image, head at the hand/footChest, Upper back · Image, head toward the elbow/kneeSolve for the Small Intestine channel →
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2. Branching (Bie Jing / Zang Fu Bie Tong)Lung channelElbow · Mirror (arm ↔ leg)Elbow · Reversed mirrorUpper abdomen, Lower back · Image, head at the hand/footChest, Upper back · Image, head toward the elbow/kneeSolve for the Lung channel →
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3. Interior–exterior pairKidney channelKnee, Back of knee · Same segment, opposite sideUpper abdomen, Lower back · Image, head at the hand/footChest, Upper back · Image, head toward the elbow/kneeSolve for the Kidney channel →
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4. Chinese clock oppositeLung channelElbow · Mirror (arm ↔ leg)Elbow · Reversed mirrorUpper abdomen, Lower back · Image, head at the hand/footChest, Upper back · Image, head toward the elbow/kneeSolve for the Lung channel →
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5. Chinese clock neighbourSmall Intestine channelElbow · Mirror (arm ↔ leg)Elbow · Reversed mirrorUpper abdomen, Lower back · Image, head at the hand/footChest, Upper back · Image, head toward the elbow/kneeSolve for the Small Intestine channel →
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6. Same channelBladder channelKnee, Back of knee · Same segment, opposite sideUpper abdomen, Lower back · Image, head at the hand/footChest, Upper back · Image, head toward the elbow/kneeSolve for the Bladder channel →
Sources
- World Health Organization. WHO Standard Acupuncture Point Locations in the Western Pacific Region. Manila: WHO Regional Office for the Western Pacific, 2008. (Location.)
- Focks C, ed. Atlas of Acupuncture. Edinburgh: Churchill Livingstone Elsevier, 2008. (Locating method and actions.)
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