BL38 (Fuxi, “Floating Cleft”) is an acupuncture point on the Bladder Meridian. It is located on the posterior thigh, 1 cun proximal to the popliteal crease, on the medial side of the biceps femoris tendon. It relaxes the sinews, alleviates pain, and benefits the lumbar region.
On the posterior thigh, 1 cun proximal to the popliteal crease, on the medial side of the biceps femoris tendon.
Perpendicular insertion 1.0 to 2.0 cun.
Relaxes the sinews, alleviates pain, and benefits the lumbar region.
Numbness of the leg, contraction of the sinews in the popliteal fossa, constipation, cystitis.
Fuxi is a local point on the posterior thigh, primarily used for conditions affecting the leg and popliteal fossa, such as hamstring tightness, sciatica, and knee pain. Its classical indications also suggest a potential, though less common, use for urinary and bowel issues like cystitis and constipation, likely through its connection to the Bladder channel.
Classical text; the translation was prepared with AI and is not clinical advice.
《類經圖翼》 Lèijīng Túyì — Illustrated Wings to the Classified Canon, Zhang Jiebin, 1624 · 卷七 · 經絡（五） · 足太陽膀胱經穴 · Source: jicheng.tw ↗
浮郄 在委陽上一寸，屈膝得之。 刺五分，灸三壯。 主治霍亂轉筋，小腹膀胱熱，大腸結，股外筋急，髀樞不仁According to this text, BL38 lies 1 cun above Weiyang and is found with the knee bent; needle 5 fen, moxa 3 cones. It records use for cramps in sudden turmoil (huoluan), heat in the lower abdomen and bladder, binding of the large intestine, tight sinews of the outer thigh and numbness at the hip joint.
《針方六集》 Zhēnfāng Liùjí — Six Collections on Needling, Wu Kun, 1618 · 卷之一·神照集 · 足太陽膀胱經圖穴十四 · 足太陽膀胱經所發六十三穴 · Source: jicheng.tw ↗
浮郄二穴，在委陽上一寸，屈膝而展得之。 《針經》刺入五分，灸三壯It is located 1 cun above Weiyang, found by bending and then extending the knee, according to this text; citing the Zhenjing, BL38 is needled 5 fen with 3 moxa cones.
《神灸經綸》 Shénjiǔ Jīnglún — Principles of Divine Moxibustion, Wu Yiding, 1851 · 卷之二 · 十二經脈起止 · 膀胱經六十三穴分寸 · Source: jicheng.tw ↗
浮郄 從殷門外循斜上一寸屈膝得之灸三壯又云在委陽上一寸According to this text, BL38 lies obliquely 1 cun up and outward from Yinmen, found with the knee bent, with 3 moxa cones; another view places it 1 cun above Weiyang.
BL38 is one of 67 points on the Bladder Meridian. Nearby points:
BL38 (Fuxi) is located on the posterior thigh, 1 cun proximal to the popliteal crease, on the medial side of the biceps femoris tendon.
BL38 relaxes the sinews, alleviates pain, and benefits the lumbar region. Common clinical indications include numbness of the leg, contraction of the sinews in the popliteal fossa, constipation, cystitis.
Perpendicular insertion 1.0 to 2.0 cun.
BL38 is a point on the Bladder Meridian (Zú Tài Yáng Páng Guāng Jīng).