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ST40 (Fenglong) – Moxibustion Acupoint Reference
Chinese Name: Fenglong (丰隆)
Meridian: Stomach (Yangming)
Location: Midway between ST36 and the lateral malleolus, 2 cun lateral to the tibia
Moxa Duration: 5-10 min | Distance: 2-3 cm
Evidence Level: Moderate
Location
ST40 is located on the lateral lower leg, midway between ST36 (Zusanli) and the tip of the lateral malleolus, approximately 2 cun lateral to the tibial crest.
Clinical Indications for Moxibustion
- Phlegm and dampness: Copious sputum, sinus congestion, chest tightness
- Dizziness and vertigo: Particularly with sensation of heaviness
- Digestive disorders: Abdominal distension, nausea with phlegm
- Mental fog: Cognitive sluggishness, heavy-headed sensation
Evidence Summary
A 2018 RCT found ST40 moxibustion significantly reduced sputum volume and improved cough symptoms in patients with chronic bronchitis (73% effective vs 45% control). The point is traditionally considered the ‘influential point for phlegm’ in TCM.
Related Articles
References
- Li Y, et al. ST40 moxibustion for chronic bronchitis: an RCT. Chin J Tuberc Respir Dis. 2018;41(5):378-384. PubMed
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