BL51 Gate of the Vital Region

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

BL51 (Huangmen, “Gate of the Vital Region”) is an acupuncture point on the Bladder Meridian. It is located on the back, 3 cun lateral to the midline, in the depression below the spinous process of the first lumbar vertebra (L1). This is also described as being level with the xiphoid process (Jiuwei, CV15). It breaks up abdominal masses and hardness, regulates the intestines, and alleviates pain.

Location

On the back, 3 cun lateral to the midline, in the depression below the spinous process of the first lumbar vertebra (L1). This is also described as being level with the xiphoid process (Jiuwei, CV15).

Needling

Oblique insertion towards the spine, 0.5 to 1.0 cun. Deep perpendicular or medial oblique insertion carries a risk of injuring the kidney.

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TCM functions

Breaks up abdominal masses and hardness, regulates the intestines, and alleviates pain..

Indications

Great hardness and masses below the heart, pain below the heart, constipation, residual breast disorders after childbirth, women's breast disorders..

Clinical notes

Classically, Huangmen is a key point for treating palpable, hard masses in the upper abdomen, particularly below the heart region. Its association with the 'Huang' or vital membranes connects it to the Sanjiao, making it useful for stubborn accumulations and stagnation. The repeated mention of 'residual breast disorders' in early texts like the Jia Yi Jing and Qian Jin Yao Fang highlights a specific, traditional application for postpartum breast issues.

On the Bladder channel

BL51 is one of 67 points on the Bladder Meridian. Nearby points:

BL47BL48BL49BL50BL52BL53BL54BL55

Frequently asked questions

Where is BL51 located?

BL51 (Huangmen) is located on the back, 3 cun lateral to the midline, in the depression below the spinous process of the first lumbar vertebra (L1). This is also described as being level with the xiphoid process (Jiuwei, CV15).

What is BL51 used for?

BL51 breaks up abdominal masses and hardness, regulates the intestines, and alleviates pain. Common clinical indications include great hardness and masses below the heart, pain below the heart, constipation, residual breast disorders after childbirth, women's breast disorders.

How is BL51 needled?

Oblique insertion towards the spine, 0.5 to 1.0 cun. Deep perpendicular or medial oblique insertion carries a risk of injuring the kidney. Caution: Deep needling is contraindicated to avoid injuring the internal organs, specifically the kidneys.

Which meridian is BL51 on?

BL51 is a point on the Bladder Meridian (Zú Tài Yáng Páng Guāng Jīng).

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⚠️ 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.