BL41 Attached Branch

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

BL41 (Fufen, “Attached Branch”) is an acupuncture point on the Bladder Meridian. It is located on the upper back, 3 cun lateral to the lower border of the spinous process of the second thoracic vertebra (T2), at the level of BL12 (Fengmen). It dispels wind, alleviates pain, relaxes sinews, invigorates channels.

Location

On the upper back, 3 cun lateral to the lower border of the spinous process of the second thoracic vertebra (T2), at the level of BL12 (Fengmen).

Needling

Oblique insertion 0.5-1.0 cun. Caution for pneumothorax.

⚠ Pneumothorax risk: oblique/shallow only, never deep perpendicular over the chest wall.

TCM functions

Dispels wind, alleviates pain, relaxes sinews, invigorates channels.

Indications

Stiffness of the neck, pain in the shoulder and back, numbness of the elbow and arm.

Clinical notes

Fufen is primarily used for dispelling wind and alleviating pain in the upper back and neck region. Its proximity to the spine makes it effective for conditions like stiff neck, shoulder pain, and intercostal neuralgia. It also helps relax sinews and invigorate channels, making it a good choice for local musculoskeletal discomfort and tension in the upper thoracic area.

On the Bladder channel

BL41 is one of 67 points on the Bladder Meridian. Nearby points:

Frequently asked questions

Where is BL41 located?

BL41 (Fufen) is located on the upper back, 3 cun lateral to the lower border of the spinous process of the second thoracic vertebra (T2), at the level of BL12 (Fengmen).

What is BL41 used for?

BL41 dispels wind, alleviates pain, relaxes sinews, invigorates channels. Common clinical indications include stiffness of the neck, pain in the shoulder and back, numbness of the elbow and arm.

How is BL41 needled?

Oblique insertion 0.5-1.0 cun. Caution for pneumothorax. Caution: ⚠ Pneumothorax risk: oblique/shallow only, never deep perpendicular over the chest wall.

Which meridian is BL41 on?

BL41 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.