KI-08 (Jiao Xin) Intersection Reach

What does KI-08 Jiao Xin do?

KI-08 regulates the Conception and Penetrating vessels and adjusts menstruation, stops uterine bleeding, and clears heat and drains damp from the lower jiao — and it is the Xi-Cleft point of the Yin Motility (Yin Qiao) vessel.

• Regulates the Ren and Chong vessels and adjusts menstruation — the two extraordinary vessels governing the uterus and menstrual blood
• Stops uterine bleeding — the acute action, and the one that marks it as a Xi-Cleft point
• Clears heat and drains damp from the lower jiao

Its classification: a Xi-Cleft point — and why “stops bleeding” follows. KI-08 is the Xi-Cleft of the Yin Motility (Yin Qiao) vessel, one of sixteen Xi-Cleft points in our data. Xi-Cleft points are where a channel’s qi and blood gather deeply, and the classical rule is that they treat acute disorders — and on yin channels, acute blood disorders in particular. That rule is exactly why a point on the inner ankle carries “stops uterine bleeding”: it is the Xi-Cleft blood-holding function, the same logic our SP-08 Di Ji and LU-06 Kong Zui records carry for their channels.

Three Xi-Clefts in one small region — a Kidney peculiarity. The lower-leg-and-ankle Kidney territory holds an unusual concentration: KI-05 Shui Quan is the Kidney channel’s own Xi-Cleft, KI-08 Jiao Xin is the Yin Qiao vessel’s, and KI-09 Zhu Bin is the Yin Wei (Yin Linking) vessel’s — three of the sixteen, clustered on one channel’s lower course. No other region carries three, and all three are confirmed against our own data.

On the name. “Jiao Xin” means Intersection Reach or Meeting of the Faithful — jiao to cross or intersect, xin trust or the faithful. The reading usually offered ties it to the Spleen channel crossing the Kidney channel near here, the point where the two meet.

Source: Sacred Lotus sources & references (channel, classification, action and translation records; the sixteen Xi-Cleft points enumerated and the three Kidney-region Xi-Clefts — KI-05, KI-08, KI-09 — confirmed against our own data), cross-referenced against multiple online sources.

What is KI-08 Jiao Xin used for?

KI-08 is used for irregular or painful menstruation, uterine bleeding, uterine prolapse, diarrhoea, constipation, and swelling and pain of the testis. Our own indication record is reproduced here in full.

• Irregular menstruation
• Dysmenorrhoea (painful periods)
• Uterine bleeding
• Prolapse of the uterus
• Diarrhoea and constipation
• Pain and swelling of the testis

A lower-jiao point, weighted to gynaecology and reproduction. The menstrual and uterine entries are the Ren-and-Chong action; uterine bleeding is the Xi-Cleft acute-blood function; the bowel and testicular entries are the wider lower-jiao and genital reach. It is a coherent lower-burner list.

An honest note. Abnormal or heavy uterine bleeding requires medical assessment — its causes range from hormonal to structural to malignant, and bleeding that is heavy, prolonged, or between periods, or any bleeding after menopause, needs prompt evaluation. Uterine prolapse should be assessed medically. A painful, swollen testicle is a medical emergency — testicular torsion can lose the testis within hours and needs same-hour surgical care. This record documents classical use only; it is not a suggestion to delay assessment.

How it is combined. With SP-06 San Yin Jiao and SP-08 Di Ji for the menstrual and bleeding indications, with KI-03 Tai Xi and KI-07 Fu Liu on its own channel, and with REN-04 Guan Yuan for the lower jiao. All held here.

Source: Sacred Lotus sources & references (indication and action records; the KI-03, KI-07, REN-04, SP-06 and SP-08 records queried from our own data), cross-referenced against multiple online sources.

Where is KI-08 Jiao Xin located?

KI-08 is on the inner lower leg, two cun above the inner ankle bone, just in front of KI-07, close behind the shin bone.

• 2 cun above KI-03 Tai Xi — KI-03 sitting between the inner ankle bone and the Achilles tendon
• 0.5 cun anterior to (in front of) KI-07 Fu Liu, which sits at the same 2-cun height
• Just posterior to the medial (inner) border of the tibia — the shin bone

KI-07 and KI-08 are a front-back pair at the same height. Both sit 2 cun above KI-03, and they are told apart by 0.5 cun front-to-back: KI-07 Fu Liu is the more posterior (toward the Achilles), KI-08 Jiao Xin the more anterior (toward the shin bone). Getting KI-03 at the ankle and KI-07 above it fixes the height; the small step forward to the tibial border fixes KI-08.

On the name. “Jiao Xin” — Intersection Reach, the crossing of the Spleen and Kidney channels near here, as noted above.

Source: Sacred Lotus sources & references (location and translation records, retained unchanged; the KI-03 and KI-07 records queried from our own data).

• A Manual of Acupuncture (p. 348): On the medial aspect of the lower leg, 2 cun superior to Taixi KID-3 and 0.5 cun anterior to Fuliu KID-7, posterior to the medial border of the tibia.
• Chinese Acupuncture and Moxibustion (p. 193): 0.5 cun anterior to Fuliu (KI-7), 2 cun above Taixi (KI-3) posterior to the medial border of tibia.

How is KI-08 Jiao Xin needled?

Our own record states perpendicular insertion of 0.5–0.7 inch, with moxibustion applicable. What follows is a neutral record of what the reference literature documents. It is not instruction, and this page does not teach technique.

• Angle and depth as recorded: perpendicular, 0.5–0.7 inch, behind the tibial border.
• Moxibustion: recorded as applicable.
• Regional anatomy: the point lies just behind the medial border of the tibia among the deep flexor muscles; the posterior tibial nerve and the posterior tibial artery and veins run in the region, deeper and more posterior; the tibia is immediately anterior.

Hazard, stated proportionately. This is a low-hazard point: no body cavity, no organ, bone immediately in front. The posterior tibial vessels run in the deep compartment behind the point; our record carries no arterial caution at KI-08, and it is not among the nine points that do — the recorded depth stays superficial to those vessels.

What is not claimed. No study measuring a safe depth at KI-08 could be located, and none is borrowed. No case report naming KI-08 was located.

Source: Sacred Lotus sources & references (needling record, retained unchanged; the nine arterial cautions queried from our own data), cross-referenced against multiple online sources; regional anatomy from standard anatomical description.

Is there research on KI-08, and what should a reader know?

No trial isolates KI-08. Where the point appears it is one component of a gynaecological protocol, and a study that includes a point in a protocol is not evidence about that point.

What this page can state with confidence. KI-08 Jiao Xin is the Xi-Cleft of the Yin Motility (Yin Qiao) vessel, one of sixteen Xi-Cleft points — which is why its record carries the acute-blood function “stops uterine bleeding”. It sits in a region unusually dense in Xi-Clefts: KI-05, KI-08 and KI-09 are three of the sixteen on the Kidney channel’s lower course, more than any other region carries. It is located 2 cun above KI-03, just in front of KI-07 at the tibial border.

A safety note that outranks any TCM claim. Abnormal uterine bleeding and a painful swollen testicle are both symptoms to have assessed urgently. This page records classical use and, in the same breath, says so.

A note on searching for it. “KI 8”, “K 8”, “KID 8” and “Jiaoxin” searches return protocol trials and unrelated material — and this channel is coded KI, K, KID and R (rein) across the literature. Our library uses KI-. Any claim attached to this point should be checked against what a study actually used.

Source: Sacred Lotus sources & references (classification, action and indication records; the sixteen Xi-Cleft points and the three Kidney-region Xi-Clefts queried, against our own data).