ST40 Abundant Bulge

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

ST40 (Fenglong, “Abundant Bulge”) is the Luo-connecting point of the Stomach Meridian. It is located on the anterior aspect of the lower leg, 8 cun inferior to ST35, 2 cun lateral to the anterior crest of the tibia. It resolves phlegm and dampness, calms the Shen.

Location

On the anterior aspect of the lower leg, 8 cun inferior to ST35, 2 cun lateral to the anterior crest of the tibia.

Needling

Perpendicular insertion 1-1.5 cun.

TCM functions

Resolves phlegm and dampness, calms the Shen.

Indications

Headache, dizziness, vertigo, cough with profuse sputum, asthma, chest pain, mental disorders, paralysis of the lower extremities.

Luo-connecting

Clinical notes

ST40 is the Luo-connecting point of the Stomach meridian, making it exceptionally powerful in resolving phlegm and dampness throughout the body, regardless of its origin. It is a primary point for treating conditions like cough with copious sputum, dizziness, vertigo, chest oppression, and even mental-emotional disorders due to phlegm misting the Shen. Its ability to transform phlegm makes it invaluable for a wide range of internal medicine conditions. It is often combined with SP9 (Yinlingquan) for dampness and phlegm resolution.

On the Stomach channel

ST40 is one of 45 points on the Stomach Meridian. Nearby points:

Frequently asked questions

Where is ST40 located?

ST40 (Fenglong) is located on the anterior aspect of the lower leg, 8 cun inferior to ST35, 2 cun lateral to the anterior crest of the tibia.

What is ST40 used for?

ST40 resolves phlegm and dampness, calms the Shen. Common clinical indications include headache, dizziness, vertigo, cough with profuse sputum, asthma, chest pain, mental disorders, paralysis of the lower extremities.

How is ST40 needled?

Perpendicular insertion 1-1.5 cun.

Which meridian is ST40 on?

ST40 is a point on the Stomach Meridian (Zú Yángmíng Wèijīng).

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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.