GB40 Mound of Ruins

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

GB40 (Qiuxu, “Mound of Ruins”) is the Yuan-source point of the Gallbladder Channel Meridian. It is located anterior to the external malleolus, in the depression on the lateral side of the tendon of extensor digitorum longus. It spreads liver qi, clears damp-heat, and benefits the ankle.

Location

Anterior to the external malleolus, in the depression on the lateral side of the tendon of extensor digitorum longus.

Needling

Perpendicular insertion 0.5-1 cun. Avoid the tendons.

TCM functions

Spreads liver qi, clears damp-heat, and benefits the ankle.

Indications

Ankle pain, swelling, hypochondriac pain, bitter taste in mouth, malaria.

Yuan-source

Clinical notes

As the Yuan-source point of the Gallbladder meridian, GB40 is crucial for regulating Gallbladder qi and addressing both excess and deficiency patterns. It excels at spreading Liver qi, resolving damp-heat in the lower jiao, and is a primary point for ankle pain and sprains. Its Yuan-source nature allows it to balance the Gallbladder's function, making it effective for emotional disharmonies like irritability and indecision.

On the Gallbladder Channel channel

GB40 is one of 44 points on the Gallbladder Channel Meridian. Nearby points:

Frequently asked questions

Where is GB40 located?

GB40 (Qiuxu) is located anterior to the external malleolus, in the depression on the lateral side of the tendon of extensor digitorum longus.

What is GB40 used for?

GB40 spreads liver qi, clears damp-heat, and benefits the ankle. Common clinical indications include ankle pain, swelling, hypochondriac pain, bitter taste in mouth, malaria.

How is GB40 needled?

Perpendicular insertion 0.5-1 cun. Avoid the tendons.

Which meridian is GB40 on?

GB40 is a point on the Gallbladder Channel Meridian (Zú Shàoyáng Dǎnjīng).

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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.