BL55 Meeting of Yang

Reviewed by · Licensed Acupuncturist & TCM Physician · Last reviewed June 2026

BL55 (Heyang, “Meeting of Yang”) is an acupuncture point on the Bladder Meridian. It is located on the posterior aspect of the lower leg, 2 cun directly inferior to the midpoint of the popliteal crease (BL40), on the line connecting BL40 and BL57. It strengthens the lumbar spine and knees, resolves Dampness, regulates the Lower Jiao, and alleviates pain.

Location

On the posterior aspect of the lower leg, 2 cun directly inferior to the midpoint of the popliteal crease (BL40), on the line connecting BL40 and BL57.

Needling

Perpendicular insertion, 1.0 to 1.5 cun.

TCM functions

Strengthens the lumbar spine and knees, resolves Dampness, regulates the Lower Jiao, and alleviates pain..

Indications

Lumbar and spinal pain, lumbar and spinal stiffness, pain radiating to the abdomen, difficulty walking, heaviness in the thigh and knee, cold hernia, unilateral scrotal pain, uterine bleeding, abnormal vaginal discharge, epilepsy without frothing at the mouth, heel pain, thigh and buttock cold and pain, leg and foot weakness, knee and thigh heaviness, uterine bleeding and abnormal discharge in women, uterine bleeding with abdominal and intestinal pain, inguinal heat, knee and shin soreness and heaviness, knee and shin coldness and pain, inguinal swelling and pain, cold hernia with unilateral pain..

Clinical notes

Heyang is a crucial distal point for acute and chronic lower back pain, especially when there is stiffness, pain radiating down the leg, or a sensation of cold. Its location between Weizhong (BL40) and Chengshan (BL57) makes it effective for treating the entire posterior chain of the leg, from the gluteus to the heel. The classical indications also highlight its utility for urogenital issues like hernias and uterine bleeding, suggesting it regulates Qi and Blood in the Lower Jiao.

On the Bladder channel

BL55 is one of 67 points on the Bladder Meridian. Nearby points:

Frequently asked questions

Where is BL55 located?

BL55 (Heyang) is located on the posterior aspect of the lower leg, 2 cun directly inferior to the midpoint of the popliteal crease (BL40), on the line connecting BL40 and BL57.

What is BL55 used for?

BL55 strengthens the lumbar spine and knees, resolves Dampness, regulates the Lower Jiao, and alleviates pain. Common clinical indications include lumbar and spinal pain, lumbar and spinal stiffness, pain radiating to the abdomen, difficulty walking, heaviness in the thigh and knee, cold hernia, unilateral scrotal pain, uterine bleeding, abnormal vaginal discharge, epilepsy without frothing at the mouth, heel pain, thigh and buttock cold and pain, leg and foot weakness, knee and thigh heaviness, uterine bleeding and abnormal discharge in women, uterine bleeding with abdominal and intestinal pain, inguinal heat, knee and shin soreness and heaviness, knee and shin coldness and pain, inguinal swelling and pain, cold hernia with unilateral pain.

How is BL55 needled?

Perpendicular insertion, 1.0 to 1.5 cun.

Which meridian is BL55 on?

BL55 is a point on the Bladder Meridian (Zú Tài Yáng Páng Guāng Jīng).

Interactive body mapConditions & evidenceFind an acupuncturistTCM glossary
⚠️ This page is for general education and is not medical advice. Acupuncture is a traditional practice; evidence varies by condition and study quality, and individual results differ. It does not replace diagnosis or treatment by a licensed professional. Always consult a qualified acupuncturist or physician.