Yinlingquan (SP9) vs Sanyinjiao (SP6) — Which Acupoint Should You Press?

What’s the Difference Between Yinlingquan and Sanyinjiao?

Yinlingquan and Sanyinjiao, both acupoints on the same spleen meridian (Spleen meridian of foot-greater yin), are often confused. Both are effective for indigestion and edema symptoms, but Yinlingquan focuses on eliminating ‘dampness’ in the digestive system, while Sanyinjiao is more effective at stabilizing the nervous system and regulating hormone balance. Since their locations are different and the pressing methods differ, it’s important to choose the acupoint that matches your symptoms.

Understanding Yinlingquan (SP9) in Depth

Precise Location

Yinlingquan is located below the knee, in the depression on the medial side of the tibia (shinbone). More precisely, it’s below the medial condyle of the tibia that you can feel when the knee is flexed, in the depression on the medial surface of the tibia. When seated with the knee bent, if you follow your fingers down from the inside of the knee, the depression just below where the bone ends is Yinlingquan. It exists symmetrically on both legs.

Recommended For

Yinlingquan is especially effective for those with digestive issues. Those who experience frequent diarrhea, a frequently bloated abdomen, or abdominal distension benefit the most. It’s also recommended for those with severe leg edema, especially those whose faces are puffy or legs feel heavy when waking up in the morning. It’s also effective when there’s pain on the inside of the knee or swelling around the knee. It’s also frequently sought by those who feel physical heaviness caused by indigestion.

Acupressure Method and Tips

When pressing Yinlingquan, use your thumb to press vertically, and it’s best to press slowly and deeply. Start with light pressure initially, then gradually increase the pressure while applying stimulation at a level of ‘painful but pleasantly so’. It’s recommended to press for 1-2 minutes at a time, 2-3 times a day. Pressing 30 minutes after a meal is particularly helpful for digestion. Massaging in a circular, rubbing motion is also effective; in this case, spend about 2-3 minutes. Pressing in the evening may result in less puffiness the next morning.

Understanding Sanyinjiao (SP6) in Depth

Precise Location

Sanyinjiao is located on the inner side of the ankle, approximately 3 cun (about 9-10 cm) above the highest point of the ankle bone (medial malleolus). It’s located on the medial posterior side of the tibia, that is, on the inner back of the calf, in the depression between the calf muscle and bone. To locate it precisely, take the highest point of the inner ankle bone as a reference, move up about four finger widths, then press slightly toward the back (back of the calf). Since this area has many nerves, pressing may cause a slightly tingling sensation.

Recommended For

Sanyinjiao has particularly excellent effects on women’s health-related symptoms. It’s strongly recommended for those with severe menstrual cramps and those with irregular menstruation. Those with insomnia who have trouble sleeping at night and those with sensitive nerves can also benefit greatly from pressing Sanyinjiao. Those with accumulated fatigue or chronic fatigue, and those with stress-related indigestion, also see good results. In addition, those with edema or heavy legs, and those with cold sensitivity, can feel improvement by consistently pressing Sanyinjiao.

Acupressure Method and Tips

Since Sanyinjiao has many nerves, it’s important to start with light pressure initially. Press vertically with your thumb; stimulation at a level where a ‘tingling sensation’ arises is appropriate. Press for 1-2 minutes at a time, 2-3 times a day. Particularly when experiencing menstrual cramps or severe insomnia, pressing between 10 PM-11 PM is especially effective. Circular massage is also good; in this case, proceed by slowly rubbing up and down. It’s best to avoid pressing Sanyinjiao during pregnancy, and it’s safer to avoid excessive stimulation.

Key Comparison Summary

Pressing Both Points Together Creates Synergy

Since Yinlingquan and Sanyinjiao are located on the same spleen meridian but have different functions, pressing them together can create a synergistic effect. For example, if you have stress-related indigestion, you can calm the nervous system by pressing Sanyinjiao and aid digestion by pressing Yinlingquan. Even for severe edema, pressing both is better since Yinlingquan improves lower body fluid metabolism and Sanyinjiao promotes overall body circulation. For abdominal distension caused by irregular menstruation, you can normalize menstruation with Sanyinjiao and relieve discomfort with Yinlingquan. However, rather than pressing all points at once, it’s better to take 5-10 minutes and proceed slowly.

Conclusion: Selection Guide by Situation

You can decide between Yinlingquan and Sanyinjiao based on your main symptoms. Choose Yinlingquan – when diarrhea, indigestion, or abdominal distension are main symptoms, or when legs frequently swell and the knee hurts, or when your face is very puffy in the morning. Choose Sanyinjiao – when you have menstrual cramps or irregular menstruation, can’t sleep at night and have sensitive nerves, or have stress-related fatigue and digestive problems. The best approach is to accurately identify the location of both acupoints, start with the one that matches your symptoms more closely, and then press the other point together if needed. If you press consistently, you can feel noticeable changes after about 2 weeks, and since individual differences are significant, it’s important to continue with patience.