Three Yin Crossing, known as Sp 6 in Traditional Chinese Medicine (TCM), is a critical convergence point where the Spleen, Liver, and Kidney meridians meet. Its unique position makes it a central point in many acupressure protocols aimed at harmonizing lower abdominal function, regulating reproductive systems, and promoting emotional stability.
This point is widely applied in gynecological, digestive, and mental-emotional conditions. Due to its powerful systemic influence, it is one of the most frequently used points in both clinical and home-based acupressure practices.
Alternate names include Sp 6, Sanyinjiao, and Three Yin Intersection.
Summary Table
| Attribute | Details |
|---|---|
| Pressure Point Name | Sp 6 – Three Yin Crossing |
| Body Area | Leg |
| Exact Location | 3 finger widths above the inner ankle bone, just behind the tibia |
| Common Uses | Menstrual discomfort, sleep disturbances, digestive imbalance, emotional tension |
| Stimulation Technique | Press with thumb or fingertip using steady, firm pressure for 1–2 minutes |
| Contraindications | Avoid during pregnancy; do not overstimulate if fatigued or weak |
Clinical Significance & Associated Conditions
As a meeting point of three yin meridians, Sp 6 addresses a broad range of symptoms affecting the lower abdomen and systemic vitality:
- Irregular menstruation, PMS, or menstrual cramps
- Urinary or reproductive imbalances
- Abdominal bloating, sluggish digestion, or appetite changes
- Emotional stress, anxiety, and insomnia
- Leg pain or weakness due to spleen and kidney deficiency
In TCM, Sp 6 is used to tonify blood, regulate qi, and nourish the yin—particularly in conditions of deficiency or stagnation.
Location
To locate Sp 6:
- Sit comfortably with the leg slightly bent.
- Place four fingers (index to pinky) above the highest point of the inner ankle bone (medial malleolus).
- Feel for a tender depression just behind the edge of the tibia bone—that’s the point.
It’s located on the medial aspect of the lower leg, approximately one hand-width above the ankle crease.
Looking for an easier way to use this point in your wellness routine? This pressure point is simple to locate and even easier to apply when guided step-by-step. It’s featured in over 70 evidence-based pressure point protocols inside our Pressure Points Guide app. Whether you’re looking to ease menstrual tension, improve digestion, or support deeper sleep, the app guides you through every session with visuals and audio. Click here to download our app.
How to Stimulate It
- Tool: Use thumb or index finger
- Method: Apply steady, vertical pressure into the point using circular or direct motion
- Duration: 1 to 2 minutes per leg
- Pressure Level: Moderate—adjust according to sensitivity
- Posture: Seated with one leg crossed or lying down with knee bent
- Frequency: Once daily or as needed for symptom support
- Pairing: Commonly paired with Ren 6 – Sea of Qi or LV 3 – Great Rushing for hormonal and emotional regulation
Benefits and Common Uses
Sp 6 offers a wide range of therapeutic effects, including:
- Hormonal Balance: Regulates menstrual cycles, eases cramps, supports fertility
- Sleep Support: Promotes relaxation, reduces insomnia, calms overactive mind
- Digestive Aid: Alleviates bloating, irregular appetite, and lower abdominal discomfort
- Yin Nourishment: Helps restore systemic hydration and emotional balance
- Urinary Function: May relieve urgency, frequency, and pelvic tension
Physiological Functions & Mechanisms
Sp 6 is a hub of interaction between organs responsible for blood production, water metabolism, and endocrine balance. In TCM theory, it harmonizes the lower jiao and stabilizes Spleen-Kidney function.
Modern anatomical mapping shows proximity to the tibial nerve and blood vessels, suggesting stimulation may influence pelvic organ reflexes and parasympathetic activity. This aligns with its calming, regulating effects on the digestive, urinary, and reproductive systems.
Practitioner Insight
Sp 6 has long been one of my most recommended points for women experiencing cycle-related discomfort or restlessness before sleep. It’s accessible, reliable, and can be enhanced with breathwork for deeper emotional release.
Safety & Contraindications
- Avoid this point during pregnancy due to its influence on uterine contractions
- Do not overstimulate if the person is highly fatigued or has low blood pressure
- Adjust pressure for those with neuropathy or circulatory issues in the lower limbs
See our full Acupressure Safety Guide and explore more practices in our Acupressure category.
As always, listen to your body and stop if discomfort arises.
Related Points & Techniques
- Ren 6 – Sea of Qi for core energy and reproductive support
- LV 3 – Great Rushing for Liver Qi flow
- KD 3 – Great Stream for kidney yin and grounding
Adjunctive techniques:
- Warm compress or foot soak before stimulation
- Breath pacing during pressure for anxiety or insomnia
- Moxibustion for cold-type pain or deficiency patterns
Scientific Perspective
Several clinical studies have explored Sp 6 in relation to menstrual pain, insomnia, and anxiety reduction. For example, research published via PubMed suggests that Sp 6 stimulation may positively influence serum cortisol levels, reduce prostaglandin activity, and regulate autonomic nervous system function (NIH).