KI8 (Jiaoxin, “Jiaoxin”) is the Xi-Cleft point of the Yin Qiao Mai point of the Kidney Channel Meridian. It is located on the medial aspect of the lower leg, 2 cun superior to the prominence of the medial malleolus, in a depression on the posterior border of the tibia, anterior to the Kidney channel's main line at Fuliu (KI7). It regulates the menses and stops bleeding, clears heat and drains dampness from the lower jiao, regulates the Yin Qiao channel, calms the spirit.
On the medial aspect of the lower leg, 2 cun superior to the prominence of the medial malleolus, in a depression on the posterior border of the tibia, anterior to the Kidney channel's main line at Fuliu (KI7).
Perpendicular insertion 0.5 to 1.0 cun.
Regulates the menses and stops bleeding, clears heat and drains dampness from the lower jiao, regulates the Yin Qiao channel, calms the spirit.
Irregular menstruation, amenorrhea, uterine bleeding, uterine prolapse, genital itching, genital pain, hernia, testicular pain and retraction, difficult urination, urinary retention, painful urinary dysfunction (lin syndrome), diarrhea, constipation, pain in the inner thigh, night sweats, abdominal pain.
Jiaoxin is the Xi-Cleft point of the Yin Qiao Mai, making it a critical point for acute conditions related to the urogenital system and lower abdomen. It is particularly effective for menstrual disorders such as dysmenorrhea, irregular cycles, and abnormal uterine bleeding. Its ability to regulate the waterways also makes it a key choice for various urinary issues, including painful or difficult urination and hernia.
Classical text; the translation was prepared with AI and is not clinical advice.
《黃帝明堂灸經》 Huángdì Míngtáng Jiǔjīng — The Yellow Emperor's Bright Hall Moxibustion Classic, Tang · 卷上 · 正人形第十六 · Source: jicheng.tw ↗
交信 二穴，在內踝上二寸後廉筋間陷者中。 灸三壯。 主氣淋，卒疝，大小便難，及膝脛內廉痛也According to this text, KI8 lies in the depression between the tendons 2 cun above the inner ankle on the posterior border, with 3 moxa cones; it was used for qi-type painful urination, sudden shan, difficult urination and defecation, and pain on the inner side of the knee and shin.
《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 ↗
交信二穴，在足內踝上二寸，少陰前，太陰後，筋骨間，陰蹺之郄。 針入四分，留五呼，灸三壯According to this text, KI8 lies 2 cun above the inner ankle, in front of the shaoyin and behind the taiyin, between tendon and bone, and is the xi (cleft) point of the yinqiao vessel; needle 0.4 cun, retain 5 breaths, 3 moxa cones.
《備急千金要方》 Bèijí Qiānjīn Yàofāng — Essential Prescriptions Worth a Thousand Gold for Emergencies, c. 650 · 第二 · Source: Wikisource ↗
妊娠九月，足少陰脈養，不可針灸其經（如湧泉、然谷、太溪、交信、築賓、複溜等穴The text states that in the ninth month of pregnancy, when the foot shaoyin channel nourishes the fetus, its points, including KI8, must not be needled or moxibusted.
《針方六集》 Zhēnfāng Liùjí — Six Collections on Needling, Wu Kun, 1618 · 卷之五·紛署集 · 足少陰及股並陰蹻陰維凡二十穴第三十一 · Source: jicheng.tw ↗
交信二穴，主氣淋㿉疝，陰急引腨，下痢赤白，陰汗，股樞內痛，二便難，小腹痛，女人血崩、陰挺、帶下，四肢淫濼The text records that KI8 was used for qi-type painful urination, tui-shan (scrotal swelling), genital tension pulling into the calf, red and white dysentery, genital sweating, inner hip pain, difficult urination and defecation, lower abdominal pain, and in women flooding, uterine prolapse and vaginal discharge, as well as aching weakness of the limbs.
KI8 is one of 27 points on the Kidney Channel Meridian. Nearby points:
KI8 (Jiaoxin) is located on the medial aspect of the lower leg, 2 cun superior to the prominence of the medial malleolus, in a depression on the posterior border of the tibia, anterior to the Kidney channel's main line at Fuliu (KI7).
KI8 regulates the menses and stops bleeding, clears heat and drains dampness from the lower jiao, regulates the Yin Qiao channel, calms the spirit. Common clinical indications include irregular menstruation, amenorrhea, uterine bleeding, uterine prolapse, genital itching, genital pain, hernia, testicular pain and retraction, difficult urination, urinary retention, painful urinary dysfunction (lin syndrome), diarrhea, constipation, pain in the inner thigh, night sweats, abdominal pain.
Perpendicular insertion 0.5 to 1.0 cun.
KI8 is a point on the Kidney Channel Meridian (Zú Shàoyīn Shènjīng).