BL66 Zutonggu

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

BL66 (Zutonggu, “Zutonggu”) is the Ying-Spring Point point of the Bladder Meridian. It is located on the lateral aspect of the foot, in the depression located just anterior and inferior to the head of the 5th metatarsophalangeal joint. It clears the head and eyes, dispels wind, calms fright and quiets the spirit.

Location

On the lateral aspect of the foot, in the depression located just anterior and inferior to the head of the 5th metatarsophalangeal joint.

Needling

Perpendicular or oblique insertion, 0.2-0.3 cun.

TCM functions

Clears the head and eyes, dispels wind, calms fright and quiets the spirit..

Indications

Headache, dizziness, neck pain, nosebleed, red eyes, epilepsy, madness, mania, malaria, aversion to wind and cold, fright and palpitations, chest fullness, indigestion, vomiting, abdominal distension, intestinal rumbling, diarrhea, accumulations and retained fluids..

Ying-Spring PointWater Point

Clinical notes

As the Ying-Spring and Water point of the Bladder channel, BL66 is effective for clearing heat from the opposite end of the channel, treating conditions like headache, red eyes, and nosebleeds. Its ability to calm the spirit is noted in classical texts for treating epilepsy and mania. Clinically, it is a useful distal point for acute head and neck issues, particularly those with a wind-heat component.

On the Bladder channel

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

Frequently asked questions

Where is BL66 located?

BL66 (Zutonggu) is located on the lateral aspect of the foot, in the depression located just anterior and inferior to the head of the 5th metatarsophalangeal joint.

What is BL66 used for?

BL66 clears the head and eyes, dispels wind, calms fright and quiets the spirit. Common clinical indications include headache, dizziness, neck pain, nosebleed, red eyes, epilepsy, madness, mania, malaria, aversion to wind and cold, fright and palpitations, chest fullness, indigestion, vomiting, abdominal distension, intestinal rumbling, diarrhea, accumulations and retained fluids.

How is BL66 needled?

Perpendicular or oblique 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).

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.