Stomach MeridianST33

Yinshi 陰市

For reference only · not a substitute for diagnosis or treatment

Short answer

3 B-cun above the patellar base, beside the outer edge of the rectus femoris tendon.

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

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

Yinshi — 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.

Yinshi — ③ Under the skin — **③ Under the skin**
Vastus lateralis muscle · Rectus femoris muscle · Vastus intermedius muscle

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

On this page

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

1Where is Yinshi?

3 B-cun above the patellar base, beside the outer edge of the rectus femoris tendon.

It is midway between ST32 and the outer end of the patellar base.

It is on the front-outer thigh.

Beneath the point

Vastus lateralis muscle · Rectus femoris muscle · Vastus intermedius muscle

Our 3D measurement · In our 3D model: 3 cun (65.0 mm) above the kneecap base, 2 mm outside the lateral edge of the rectus femoris.

2How do I find it on my body?

Straighten the knee and tighten the thigh.
Find the rectus femoris tendon running down to the kneecap.
Go 3 B-cun (about four finger-widths) above the patellar base and press just outside the tendon.

Check · midway between ST32 and the outer end of the patellar base.

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

rectus femoris: The muscle running straight down the middle of the front of the thigh. It starts on the pelvis, joins the kneecap tendon, straightens the knee and lifts the leg.
vastus lateralis: The large muscle on the outer front of the thigh. It straightens the knee.
vastus intermedius: The muscle just under rectus femoris, lying on the front of the femur. It straightens the knee.

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?

The name joins yin and shi (market). WHO adds a cross-check: it lies midway between ST32 and the lateral end of the patellar base.

From traditional texts — not a claim of effect.

?FAQ

Where exactly is Yinshi?

3 B-cun above the patellar base, beside the outer edge of the rectus femoris tendon. It is midway between ST32 and the outer end of the patellar base. It is on the front-outer thigh.

How do I find Yinshi?

Straighten the knee and tighten the thigh. Find the rectus femoris tendon running down to the kneecap. Go 3 B-cun (about four finger-widths) above the patellar base and press just outside the tendon. midway between ST32 and the outer end of the patellar base.

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.

← PreviousFutu · ST32 Next →Liangqiu · ST34

Sources

Location: WHO Standard Acupuncture Point Locations in the Western Pacific Region (2008), p. 62
Standard comparison: Chinese national standard GB/T 12346-2021 (Nomenclature and location of meridian points)
Korean anatomical terms and locating tips: KMCRIC Standard Acupoint DB (Korea)
Classification source: Zhenjiu Jiayi Jing vol. 3 (Siku Quanshu edition)
Classification 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.