BL37 (Yinmen, “Gate of Abundance”) is an acupuncture point on the Bladder Meridian. It is located on the posterior midline of the thigh, 6 cun inferior to the center of the transverse gluteal fold (BL36 Chengfu) and 8 cun superior to the popliteal crease (BL40 Weizhong). It activates the channel and alleviates pain, strengthens the lumbar region and legs, resolves local swelling and stagnation.
On the posterior midline of the thigh, 6 cun inferior to the center of the transverse gluteal fold (BL36 Chengfu) and 8 cun superior to the popliteal crease (BL40 Weizhong).
Perpendicular insertion, 1.5 to 2.5 cun. Caution is advised to avoid the sciatic nerve, which lies deep to the biceps femoris muscle.
Activates the channel and alleviates pain, strengthens the lumbar region and legs, resolves local swelling and stagnation..
Low back pain where one cannot bend forward or backward, low back and spine cannot bend forward or backward, low back pain where one can bend forward but not backward, pain in the low back, spine, buttocks, and coccyx from cold, swelling of the outer thigh, low back and spine pain pulling on each other as if dislocated, pain resulting from lifting heavy objects with subsequent stagnation of 'bad blood'..
Yinmen is a primary distal point for treating acute and chronic low back pain, especially sciatica and pain radiating down the posterior leg. Its location directly over the hamstring muscles and sciatic nerve makes it effective for local conditions like hamstring strains and posterior thigh pain. The classical indications emphasize its utility for lumbar pain with severe restriction of movement, particularly difficulty with extension (bending backward), often associated with trauma or strain.
BL37 is one of 67 points on the Bladder Meridian. Nearby points:
BL37 (Yinmen) is located on the posterior midline of the thigh, 6 cun inferior to the center of the transverse gluteal fold (BL36 Chengfu) and 8 cun superior to the popliteal crease (BL40 Weizhong).
BL37 activates the channel and alleviates pain, strengthens the lumbar region and legs, resolves local swelling and stagnation. Common clinical indications include low back pain where one cannot bend forward or backward, low back and spine cannot bend forward or backward, low back pain where one can bend forward but not backward, pain in the low back, spine, buttocks, and coccyx from cold, swelling of the outer thigh, low back and spine pain pulling on each other as if dislocated, pain resulting from lifting heavy objects with subsequent stagnation of 'bad blood'.
Perpendicular insertion, 1.5 to 2.5 cun. Caution is advised to avoid the sciatic nerve, which lies deep to the biceps femoris muscle. Caution: The Su Wen, as cited in Zhen Jiu Da Cheng, warns against needling this point in autumn. The Zhen Jiu Ju Ying lists it in a song of points forbidden to moxa, though other sources permit it.
BL37 is a point on the Bladder Meridian (Zú Tài Yáng Páng Guāng Jīng).