KI2 (Rangu, “Blazing Valley”) is the Ying-Spring Point point of the Kidney Channel Meridian. It is located on the medial aspect of the foot, in the depression on the lower border of the navicular tuberosity, anterior and inferior to the medial malleolus. It clears deficiency heat, benefits the throat, regulates the lower jiao, and tonifies Kidney Yin.
On the medial aspect of the foot, in the depression on the lower border of the navicular tuberosity, anterior and inferior to the medial malleolus.
Perpendicular insertion 0.5 to 1.0 cun.
Clears deficiency heat, benefits the throat, regulates the lower jiao, and tonifies Kidney Yin.
Thirst, diabetes , jaundice, one foot cold and one foot hot, tongue paralysis, sweating, night sweats, seminal emission, infertility in women, uterine prolapse, irregular menstruation, vaginal itching, sudden heart pain, chest and hypochondriac fullness, coughing up blood, throat painful obstruction, difficulty swallowing, fear and fright as if about to be seized, shortness of breath with drooling, foot swelling making it difficult to walk, cold shan disorder, lower abdominal distention, emaciation, flaccidity and inversion, profuse diarrhea, infantile umbilical wind with lockjaw, bad blood retained in the abdomen, mouth heat, dry tongue, sore throat, upward surging qi, vexation and heart pain, back and inner thigh pain, lethargy, foot sole heat and pain, sudden heart pain with abdominal distention, urinary dripping with white turbidity, acid reflux, inability to stand for long.
As the Ying-Spring and Fire point of the Kidney channel, Rangu is a primary point for clearing deficiency heat manifesting as sore throat, night sweats, and thirst. Its location on the foot and connection to the Kidney channel also make it effective for urogenital issues like irregular menstruation, seminal emission, and uterine prolapse. Classical sources note that needling it can induce hunger, suggesting an effect on the Stomach and appetite.
Classical text; the translation was prepared with AI and is not clinical advice.
《黃帝內經》 Huángdì Nèijīng — The Yellow Emperor's Inner Canon, c. 2nd–1st c. BCE · mou-ci-lun · Source: Wikisource ↗
邪客於足少陰之絡，令人卒心痛暴脹，胸脇支滿，無積者，刺然骨之前出血，如食頃而已The text records that when a pathogen lodges in the foot shaoyin network vessel, causing sudden heart pain, abrupt distension and propping fullness of the chest and flanks without accumulation, one pricks in front of Rangu (KI2) to let blood, and it settles in about the time of a meal.
《千金翼方》 Qiānjīn Yìfāng — Supplement to the Thousand Gold Prescriptions, c. 682 · 卷26 · Source: Wikisource ↗
絕子，灸然谷五十壯，穴在內踝前直下一寸The text records moxibustion at KI2 with 50 cones for childlessness; the point lies 1 cun straight below the front of the inner ankle.
《針灸甲乙經》 Zhēnjiǔ Jiǎyǐ Jīng — Systematic Classic of Acupuncture & Moxibustion, c. 256–282 · 卷05 · Source: Wikisource ↗
嗌中腫，不能內唾，不能出唾者，繆刺然骨之前出血立已，左取右，右取左The text records that for swelling in the throat with inability to swallow or spit out saliva, one uses crosswise pricking in front of Rangu (KI2) to let blood, the left side for the right and the right for the left, and it is said to stop at once.
《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 · 卷七 · 足部主病針灸要穴歌 · Source: jicheng.tw ↗
然谷主治喉痹風，咳血足心熱遺精，疝氣溫瘧多渴熱，兼治初生兒臍風The text records that KI2 was used for throat obstruction (houbi) with wind, coughing blood, hot soles, seminal emission, shan qi, warm malaria with great thirst and heat, and also umbilical wind in newborns.
KI2 is one of 27 points on the Kidney Channel Meridian. Nearby points:
KI2 (Rangu) is located on the medial aspect of the foot, in the depression on the lower border of the navicular tuberosity, anterior and inferior to the medial malleolus.
KI2 clears deficiency heat, benefits the throat, regulates the lower jiao, and tonifies Kidney Yin. Common clinical indications include thirst, diabetes , jaundice, one foot cold and one foot hot, tongue paralysis, sweating, night sweats, seminal emission, infertility in women, uterine prolapse, irregular menstruation, vaginal itching, sudden heart pain, chest and hypochondriac fullness, coughing up blood, throat painful obstruction, difficulty swallowing, fear and fright as if about to be seized, shortness of breath with drooling, foot swelling making it difficult to walk, cold shan disorder, lower abdominal distention, emaciation, flaccidity and inversion, profuse diarrhea, infantile umbilical wind with lockjaw, bad blood retained in the abdomen, mouth heat, dry tongue, sore throat, upward surging qi, vexation and heart pain, back and inner thigh pain, lethargy, foot sole heat and pain, sudden heart pain with abdominal distention, urinary dripping with white turbidity, acid reflux, inability to stand for long.
Perpendicular insertion 0.5 to 1.0 cun. Caution: The Jia Yi Jing and Qian Jin Yao Fang both state: 'When needling Rangu, do not cause excessive bleeding.' (刺無多見血).
KI2 is a point on the Kidney Channel Meridian (Zú Shàoyīn Shènjīng).