SP-6 - Three Yin Intersection
三阴交 - Sān yīn jiāo
Point Region: Lower leg
Location & How to Find
Anatomical Location: On the inner side of the lower leg, just behind the inner edge of the shin bone (tibia), 3 cun above the inner ankle bone. It lies 1 cun above KI-8.
Distances are in cun, a unit that scales with each person's body. As a guide, the width of your thumb at its joint is 1 cun, and your four fingers held together, measured across the middle joints, are 3 cun.
How to Locate:
- Find the most prominent point of your inner ankle bone
- Measure four finger-widths straight up the leg
- The point is just behind the inner edge of the shin bone
How to Apply Pressure
Place four fingers above the inner ankle bone; the point is just behind the edge of the shin bone at the top of your fingers. Press into the soft tissue, not the bone, firm but never painful. Do not press this point during pregnancy, and skip it after leg surgery.
Traditional Indications
In TCM, this point is traditionally used for:
- Irregular menstruation
- Painful periods
- Insomnia
- PMS
- Infertility
- Digestive problems
- Anxiety
- Hormonal imbalances
- Urinary problems
Related Health Concerns
Related Acupoints
Select a point to see its location, how to find it, and its traditional uses.
Important Precautions
Avoid this point with:
- Pregnancy
- Recent leg surgery
- Severe reproductive disorders