ST40 (Fenglong, “Fenglong”) is the Luo-Connecting point point of the Stomach Meridian. It is located on the anterior aspect of the lower leg, 8 cun superior to the prominence of the lateral malleolus, in a depression lateral to the anterior crest of the tibia, approximately two finger-breadths from the crest. It transforms phlegm and dampness, calms the spirit (Shen), harmonizes the stomach, opens the chest, and activates the channel to stop pain.
On the anterior aspect of the lower leg, 8 cun superior to the prominence of the lateral malleolus, in a depression lateral to the anterior crest of the tibia, approximately two finger-breadths from the crest.
Perpendicular insertion, 1.0 to 1.5 cun.
Transforms phlegm and dampness, calms the spirit (Shen), harmonizes the stomach, opens the chest, and activates the channel to stop pain.
Phlegm-damp cough, asthma, chest pain as if stabbed, abdominal pain like being cut with a knife, constipation, difficult urination, headache, dizziness, mania, seeing ghosts, inappropriate laughter, climbing to high places to sing, stripping off clothes and running, epilepsy, sudden loss of voice, throat obstruction, swelling of the face and four limbs, leg pain, foot pain, weakness or atrophy of the lower leg, paralysis.
Fenglong is the paramount point for resolving phlegm anywhere in the body, whether it is substantial phlegm in the Lungs or insubstantial phlegm clouding the mind. Its ability to clear phlegm makes it essential for treating a wide range of conditions, from cough and asthma to dizziness, mania, and epilepsy. As the Luo-connecting point of the Stomach channel, it also connects with the Spleen channel, strengthening its function in transforming dampness, the root of phlegm.
Classical text; the translation was prepared with AI and is not clinical advice.
《針灸甲乙經》 Zhēnjiǔ Jiǎyǐ Jīng — Systematic Classic of Acupuncture & Moxibustion, c. 256–282 · 卷07 · Source: Wikisource ↗
厥頭痛，面浮腫，煩心，狂見鬼，善笑不休，發於外有所大喜，喉痺不能言，豐隆主之The text records that ST40 was used for jue-type headache, puffy swelling of the face, vexation of the heart, mania with seeing ghosts, incessant laughing as if from some great joy, and throat bi with inability to speak.
《黃帝明堂灸經》 Huángdì Míngtáng Jiǔjīng — The Yellow Emperor's Bright Hall Moxibustion Classic, Tang · 卷上 · 正人形第三 · Source: jicheng.tw ↗
豐隆 二穴，在外踝上八寸陷者中。 灸七壯。 主厥逆胸痛，氣刺不可忍，腹中如刀㽲，大小便難，四肢不收，身體倦怠，膝腿痠痛，屈伸難也According to this text, ST40 lies in the depression 8 cun above the lateral malleolus and receives 7 moxa cones; it was used for jue counterflow with chest pain, unbearable stabbing qi, knife-like colic in the abdomen, difficult urination and defecation, slack limbs, bodily fatigue, and aching knees and legs hard to bend and stretch.
《醫學綱目·刺灸》 Yīxué Gāngmù · Cìjiǔ — Outline of Medicine: Needling and Moxibustion, Lou Ying, 1565 · 卷之八·陰陽臟腑部 · 穴法下 · Source: jicheng.tw ↗
豐隆二穴，在外踝上八寸下䯒外廉陷中，別走太陰，足陽明絡。 針入三分，灸三壯According to this text, ST40 lies 8 cun above the lateral malleolus in the depression at the outer edge of the lower shin bone; it is the luo point of the foot yangming that branches off to the taiyin, and is needled 0.3 cun with 3 moxa cones.
《醫宗金鑑·刺灸心法要訣》 Yīzōng Jīnjiàn · Cìjiǔ Xīnfǎ Yàojué — Golden Mirror of Medicine: Essential Teachings on Acupuncture & Moxibustion, Wu Qian et al., 1742 · 卷一 · 十二經表裡原絡總歌 · 脾經表裡原絡穴主治歌 · Source: jicheng.tw ↗
胃經表之絡穴豐隆，二穴應刺之證即：身重，倦怠，面黃，舌強而疼，腹滿時時作痛The text records that ST40, the luo point of the stomach channel, was needled for heaviness of the body, fatigue, a yellow face, a stiff and painful tongue, and abdominal fullness with intermittent pain.
ST40 is one of 45 points on the Stomach Meridian. Nearby points:
ST40 (Fenglong) is located on the anterior aspect of the lower leg, 8 cun superior to the prominence of the lateral malleolus, in a depression lateral to the anterior crest of the tibia, approximately two finger-breadths from the crest.
ST40 transforms phlegm and dampness, calms the spirit (Shen), harmonizes the stomach, opens the chest, and activates the channel to stop pain. Common clinical indications include phlegm-damp cough, asthma, chest pain as if stabbed, abdominal pain like being cut with a knife, constipation, difficult urination, headache, dizziness, mania, seeing ghosts, inappropriate laughter, climbing to high places to sing, stripping off clothes and running, epilepsy, sudden loss of voice, throat obstruction, swelling of the face and four limbs, leg pain, foot pain, weakness or atrophy of the lower leg, paralysis.
Perpendicular insertion, 1.0 to 1.5 cun. Caution: The Qian Jin Yao Fang advises against needling or moxibustion on the Stomach channel, including Fenglong, during the sixth month of pregnancy.
ST40 is a point on the Stomach Meridian (Zú Yángmíng Wèijīng).