BL66 Foot Valley Pass

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

BL66 (Zutonggu, “Foot Valley Pass”) is the Ying-Spring (Water) point of the Bladder Meridian. BL66 is located on the lateral aspect of the foot, anterior to the head of the fifth metatarsal bone, at the junction of the red and white skin. It clears heat, calms the spirit, and benefits the head.

Location

BL66 is located on the lateral aspect of the foot, anterior to the head of the fifth metatarsal bone, at the junction of the red and white skin.

Needling

Perpendicular insertion 0.2-0.3 cun.

TCM functions

Clears heat, calms the spirit, and benefits the head.

Indications

Headache, neck rigidity, epistaxis, vertigo, infantile convulsion.

Ying-Spring (Water)

Clinical notes

BL66 is the Ying-Spring (Water) point of the Bladder meridian, primarily used for clearing heat from the head and calming the spirit. It is effective for headaches, dizziness, nosebleed, and eye pain, especially when due to heat. As an Ying-Spring point, it is also indicated for febrile diseases and heat sensations in the body, and can help with mental restlessness and anxiety.

On the Bladder channel

BL66 is one of 67 points on the Bladder Meridian. Nearby points:

Frequently asked questions

Where is BL66 located?

BL66 is located on the lateral aspect of the foot, anterior to the head of the fifth metatarsal bone, at the junction of the red and white skin.

What is BL66 used for?

BL66 clears heat, calms the spirit, and benefits the head. Common clinical indications include headache, neck rigidity, epistaxis, vertigo, infantile convulsion.

How is BL66 needled?

Perpendicular insertion 0.2-0.3 cun.

Which meridian is BL66 on?

BL66 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.