The xi-cleft point of yin heel vessel. Lingshu-Weiqi: "The root of foot shaoyin meridian, three cun below and above medial malleolus."

bubble_chart Etymology

"Jiao" (交), intersection or meeting; "xin" (信) refers to foot taiyin spleen meridian, as spleen is associated with the earth element, and "earth virtue is trust" (Leijing Tuyi-Wuxing Tonglun). The qi of foot shaoyin kidney meridian intersects here with foot taiyin spleen meridian at Sanyinjiao (SP6), hence the name. Located anterior to the medial side of Achilles tendon, it is also known by the alternate name "Neijin" (内筋, inner tendon).

bubble_chart Location

Jiaoxin (KI8) acupoint
(adapted from "Meridians and Acupoints")

• Zhenjiu Jiayi Jing: "Two cun above the medial malleolus, anterior to shaoyin, behind taiyin, between sinews and bones";
• Zhenjiu Jicheng : "One cun below Sanyinjiao (SP6), slightly posterior";
• Zhenjiu Juying mistakenly states: "Anterior to the bone is Fuliu (KI7), and posterior to the tendon is Jiaoxin (KI8)".

bubble_chart Anatomy

• Muscle: flexor digitorum longus.
• Nerve: medial cutaneous branch of saphenous nerve; posteriorly, tibial nerve.
• Vessels: posterior tibial artery and vein.

bubble_chart Manipulation

Perpendicular insertion 0.3~1 cun. Moxibustion with moxa cone 3 to 5 times, moxibustion with moxa stick for 10 to 15 minutes.

bubble_chart Efficacy

Disinhibit water, regulate menstruation, regulate lower jiao.

• Classical: pain in lower abdominal, difficulty with urination and defecation, amenorrhea, uterine prolapse, night sweating, diarrhea with bloody or mucus discharge, abnormal uterine bleeding, dribbling urination, hernia, genital tension, pain in inner thigh and calf.
• Modern: dysfunctional uterine bleeding, orchitis, urinary retention.

bubble_chart Combinations

• Abnormal uterine bleeding: Jiaoxin (KI8), Heyang (BL55).
• Persistent abnormal uterine bleeding: Yingu (KI10), Jiaoxin (KI8), Sanyinjiao (SP6), Taichong ( LR3).