BL64 Capital Bone

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

BL64 (Jinggu, “Capital Bone”) is the Yuan-source point of the Bladder Meridian. BL64 is located on the lateral aspect of the foot, inferior and anterior to the tuberosity of the fifth metatarsal bone, at the junction of the red and white skin. It clears heat, calms the spirit, and alleviates pain.

Location

BL64 is located on the lateral aspect of the foot, inferior and anterior to the tuberosity of the fifth metatarsal bone, at the junction of the red and white skin.

Needling

Perpendicular insertion 0.3-0.5 cun.

TCM functions

Clears heat, calms the spirit, and alleviates pain.

Indications

Headache, neck rigidity, epistaxis, epilepsy, low back pain, pain in the foot.

Yuan-source

Clinical notes

BL64 is the Yuan-source point of the Bladder meridian, making it essential for regulating the Bladder organ and meridian, and for treating both excess and deficiency patterns. It is excellent for clearing heat and calming the spirit, indicated for headaches, dizziness, epilepsy, and mental disorders. As a Yuan-source point, it can be used to treat a wide range of Bladder meridian pathologies, including lumbar pain and stiffness.

On the Bladder channel

BL64 is one of 67 points on the Bladder Meridian. Nearby points:

Frequently asked questions

Where is BL64 located?

BL64 is located on the lateral aspect of the foot, inferior and anterior to the tuberosity of the fifth metatarsal bone, at the junction of the red and white skin.

What is BL64 used for?

BL64 clears heat, calms the spirit, and alleviates pain. Common clinical indications include headache, neck rigidity, epistaxis, epilepsy, low back pain, pain in the foot.

How is BL64 needled?

Perpendicular insertion 0.3-0.5 cun.

Which meridian is BL64 on?

BL64 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.