Kidney MeridianKI8

Jiaoxin 交信

For reference only · not a substitute for diagnosis or treatment

Short answer

Inner side of the lower leg, in the hollow just behind the inner edge of the tibia.

Xi-cleft point of the Yin Qiao vessel

See it in 3DRotate the body and peel back the skin to see the bones and muscles beneath.
Open the 3D Acupoint Map →

🖼See it in pictures

Jiaoxin — ① Where on the body? — **① Where on the body?**

Jiaoxin — Textbook view — skin on the left, muscle and bone underneath on the right — **Textbook view — skin on the left, muscle and bone underneath on the right**
Location and structures come from our 3D model; only the drawing style was refined with AI. Labels are added by us.

Jiaoxin — ③ Under the skin — **③ Under the skin**
Flexor digitorum longus · Tibia · Tibialis posterior muscle · Flexor hallucis longus

Rendered straight from the 3D model at the computed location. The glowing ring marks Jiaoxin.

On this page

Where is Jiaoxin?
How do I find it on my body?
Before you press
How has it been used traditionally?
FAQ

1Where is Jiaoxin?

Inner side of the lower leg, in the hollow just behind the inner edge of the tibia.

It is 2 B-cun above the inner ankle peak and 0.5 B-cun in front of Fuliu (KI7).

Beneath the point

Flexor digitorum longus · Tibia · Tibialis posterior muscle · Flexor hallucis longus

Our 3D measurement · In our 3D model: 2 cun (46.0 mm) above the peak of the medial malleolus (1 cun = 23.00 mm, from the lower border of the medial tibial condyle to the malleolus = 13 cun), just behind the medial border of the tibia (1 cun below SP6).

2How do I find it on my body?

Take the same height as Fuliu, 2 B-cun above the inner ankle peak.
Move forward and feel the inner edge of the tibia.
Press the hollow just behind that edge.

Check · it is 0.5 B-cun in front of Fuliu.

What is a “cun”?

A cun is a body-scaled unit of length. The precise way is to divide a bone length into equal parts (proportional bone cun); finger widths are a quick estimate.

📖 Words explained

flexor digitorum longus: A muscle that starts deep on the inner back of the calf, curves behind the inner ankle and attaches to the tip bones of the 2nd–5th toes. It bends the toes.
flexor hallucis longus: A muscle that starts deep in the back of the calf, curves behind the inner ankle and attaches to the tip bone of the big toe. It bends the big toe to push off the ground.
tibialis posterior: The deepest muscle in the back of the calf. It curves behind the inner ankle to the bones of the inner sole and holds up the inner arch.

3Before you press

⚠ Do not press when

Avoid broken or swollen skin and press only to a comfortable level.
Acupressure is not a substitute for medical care.

4How has it been used traditionally?

Classified as the Xi-cleft point of the Yin Qiao vessel (Zhenjiu Jiayi Jing) — a historical classification, not a claim of effect.
The name joins jiao (to meet, to exchange) and xin (trust).

From traditional texts — not a claim of effect.

?FAQ

Where exactly is Jiaoxin?

Inner side of the lower leg, in the hollow just behind the inner edge of the tibia. It is 2 B-cun above the inner ankle peak and 0.5 B-cun in front of Fuliu (KI7).

How do I find Jiaoxin?

Take the same height as Fuliu, 2 B-cun above the inner ankle peak. Move forward and feel the inner edge of the tibia. Press the hollow just behind that edge. it is 0.5 B-cun in front of Fuliu.

What should I watch out for?

Avoid broken or swollen skin and press only to a comfortable level. Acupressure is not a substitute for medical care.

← PreviousFuliu · KI7 Next →Zhubin · KI9

Sources

Location: WHO Standard Acupuncture Point Locations in the Western Pacific Region (2008), p. 139
Standard comparison: Chinese national standard GB/T 12346-2021 (Nomenclature and location of meridian points)
Korean anatomical terms and point names: KMCRIC Standard Acupoint DB (Korea)
Classification source: Zhenjiu Jiayi Jing (Huangfu Mi), vol. 3
Traditional use cross-check: AcuAtlas dataset (CC BY 4.0)

Positions computed from the WHO standard locations (2008) on Z-Anatomy (CC BY-SA 4.0) · BodyParts3D © DBCLS. For reference only — not a substitute for diagnosis or treatment. See a clinician if you are unwell.