GB37 Bright Light

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

GB37 (Guangming, “Bright Light”) is the Luo-connecting point of the Gallbladder Channel Meridian. It is located on the lateral aspect of the lower leg, 5 cun superior to the prominence of the lateral malleolus, on the anterior border of the fibula. It benefits the eyes and clears obstructions from the meridian.

Location

On the lateral aspect of the lower leg, 5 cun superior to the prominence of the lateral malleolus, on the anterior border of the fibula.

Needling

Perpendicular insertion 0.8-1.2 cun.

TCM functions

Benefits the eyes and clears obstructions from the meridian.

Indications

Eye diseases, night blindness, leg pain, atrophy of lower limbs.

Luo-connecting

Clinical notes

As the Luo-connecting point of the Gallbladder meridian, GB37 connects to the Liver meridian, making it a key point for balancing Liver and Gallbladder functions. It is renowned for its ability to benefit the eyes, treating a wide range of eye disorders such as blurred vision, night blindness, optic atrophy, and red, painful eyes, especially when due to Liver-Gallbladder heat or deficiency. It also clears obstructions from the meridian, alleviating pain and numbness along the Gallbladder channel. It is often paired with Liv3 (Taichong) for eye conditions.

On the Gallbladder Channel channel

GB37 is one of 44 points on the Gallbladder Channel Meridian. Nearby points:

Frequently asked questions

Where is GB37 located?

GB37 (Guangming) is located on the lateral aspect of the lower leg, 5 cun superior to the prominence of the lateral malleolus, on the anterior border of the fibula.

What is GB37 used for?

GB37 benefits the eyes and clears obstructions from the meridian. Common clinical indications include eye diseases, night blindness, leg pain, atrophy of lower limbs.

How is GB37 needled?

Perpendicular insertion 0.8-1.2 cun.

Which meridian is GB37 on?

GB37 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.