Yin Mound Spring
阴陵泉 Yīn Líng Quán · SP-9
About SP-9 Yin Mound Spring
SP-9 Yinlingquan is the he-sea point of the Spleen meridian and the body's primary point for resolving dampness -- the heavy, stagnant accumulation of fluids that TCM considers one of the most common and stubborn pathological conditions. Where ST-40 is the master point for phlegm (the condensed, more substantial form of pathological fluid), SP-9 addresses dampness in its fluid, pervasive form: edema, water retention, heavy limbs, loose stools, abdominal bloating, and the foggy lethargy that accompanies excess moisture in the body.
The Spleen's central function in TCM is transformation and transportation -- converting food and drink into usable substances and moving them to where they are needed. When this function fails, fluids accumulate as dampness. SP-9, sitting at the he-sea point where the Spleen meridian's qi runs deepest, directly accesses the organ's capacity to process and drain fluids. The Water element designation of this point reinforces its specific action on fluid metabolism.
The name 'Yin Mound Spring' describes a spring of water emerging from the yin (inner, shaded) side of a mound -- here, the mound is the medial condyle of the tibia. The imagery captures the point's function perfectly: it releases trapped water from the body just as a spring releases water from the earth. Clinically, the point is remarkably sensitive when dampness is present -- patients with significant fluid retention often find SP-9 exquisitely tender, which serves as both a diagnostic sign and a guide for treatment intensity.
How to Find This Point
Run your thumb up the inner edge of the shin bone toward the knee. Where the bone curves inward and your thumb naturally slips into a depression below the knee, that is SP-9. It sits in the soft area just below and behind the bony knob on the inner side of the knee.
Technique
Press firmly with the thumb into the depression below the medial condyle. Deep sustained pressure or circular kneading. The point is often very tender in individuals with dampness, producing a strong ache.
Pressure & Duration
Firm pressure for 2-3 minutes per side.
Benefits
Resolves dampness, benefits the lower burner, opens the Water Passages, benefits urination, removes edema, relieves knee pain
Indications
Edema (especially lower body), urinary retention or difficulty, abdominal distension, diarrhea, knee pain (medial), vaginal discharge, jaundice, heavy limbs
TCM Actions
Resolves dampness, opens the Water Passages, benefits the Lower Jiao, he-sea point of the Spleen meridian
Self-Care Use
The primary point for draining excess fluid and dampness from the body. Press firmly below the inner knee when experiencing water retention, puffy ankles, heavy legs, bloating, or a general waterlogged feeling. Particularly useful during humid weather when dampness symptoms worsen. Press 2-3 minutes per side. Combine with gentle leg elevation for edema.
Contraindications & Cautions
No major contraindications for acupressure. Use moderate pressure if there is acute medial knee inflammation.
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Frequently Asked Questions
Where is the SP-9 Yin Mound Spring acupressure point located?
SP-9 Yin Mound Spring (Yīn Líng Quán) is located at: On the medial aspect of the lower leg, in the depression of the lower border of the medial condyle of the tibia, at the junction of the medial condyle and the posterior border of the tibia. Run your thumb up the inner edge of the shin bone toward the knee. Where the bone curves inward and your thumb naturally slips into a depression below the knee, that is SP-9. It sits in the soft area
How long should I press SP-9 Yin Mound Spring?
Apply firm pressure to SP-9 for 2-3 minutes per side. Press firmly with the thumb into the depression below the medial condyle. Deep sustained pressure or circular kneading. The point is often very tender in individuals with dampness, producing a strong
What are the benefits of stimulating SP-9 Yin Mound Spring?
Resolves dampness, benefits the lower burner, opens the Water Passages, benefits urination, removes edema, relieves knee pain
Is it safe to do acupressure on SP-9 at home?
The primary point for draining excess fluid and dampness from the body. Press firmly below the inner knee when experiencing water retention, puffy ankles, heavy legs, bloating, or a general waterlogge Cautions: No major contraindications for acupressure. Use moderate pressure if there is acute medial knee inflammation.
Which meridian does SP-9 belong to?
SP-9 Yin Mound Spring belongs to the Foot Taiyin Spleen Meridian, which is associated with the Water (he-sea point of Earth meridian) element. Its TCM actions include: Resolves dampness, opens the Water Passages, benefits the Lower Jiao, he-sea point of the Spleen meridian