SP10 Sea of Blood

Reviewed by · Licensed Acupuncturist & TCM Physician · Last reviewed June 2026

SP10 (Xuèhǎi, “Sea of Blood”) is the Point of the Sea of Blood point of the Spleen Channel Meridian. It is located on the medial aspect of the thigh, superior to the patella. Classical sources vary, placing it 2, 2.5, or 3 cun superior to the superomedial corner of the patella, at the margin between the red and white skin, on the bulge of the vastus medialis muscle when the knee is flexed. It regulates Blood, cools Blood, invigorates Blood, harmonizes menstruation.

Location

On the medial aspect of the thigh, superior to the patella. Classical sources vary, placing it 2, 2.5, or 3 cun superior to the superomedial corner of the patella, at the margin between the red and white skin, on the bulge of the vastus medialis muscle when the knee is flexed.

Needling

Perpendicular insertion 1.0 to 1.5 cun. Oblique insertion proximally or distally is also used.

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TCM functions

Regulates Blood, cools Blood, invigorates Blood, harmonizes menstruation..

Indications

Women's irregular menstruation, menstrual bleeding that does not stop, amenorrhea (blood closed and not flowing), uterine bleeding (beng zhong), persistent uterine bleeding with foul-smelling blood (lou xia e xue), postpartum bleeding, abdominal distension due to rebellious qi, lower abdominal pain, lower body sores, various skin sores..

Point of the Sea of Blood

Clinical notes

As its name 'Sea of Blood' implies, SP10 is a paramount point for any disorder involving the Blood, whether heat, stasis, or deficiency. It is indispensable in gynecology for regulating menstruation and stopping abnormal uterine bleeding. It is also a key point in dermatology for skin conditions characterized by heat in the blood, such as eczema, urticaria, or psoriasis, often presenting with redness and itching.

On the Spleen Channel channel

SP10 is one of 21 points on the Spleen Channel Meridian. Nearby points:

Frequently asked questions

Where is SP10 located?

SP10 (Xuèhǎi) is located on the medial aspect of the thigh, superior to the patella. Classical sources vary, placing it 2, 2.5, or 3 cun superior to the superomedial corner of the patella, at the margin between the red and white skin, on the bulge of the vastus medialis muscle when the knee is flexed.

What is SP10 used for?

SP10 regulates Blood, cools Blood, invigorates Blood, harmonizes menstruation. Common clinical indications include women's irregular menstruation, menstrual bleeding that does not stop, amenorrhea (blood closed and not flowing), uterine bleeding (beng zhong), persistent uterine bleeding with foul-smelling blood (lou xia e xue), postpartum bleeding, abdominal distension due to rebellious qi, lower abdominal pain, lower body sores, various skin sores.

How is SP10 needled?

Perpendicular insertion 1.0 to 1.5 cun. Oblique insertion proximally or distally is also used. Caution: The Qian Jin Yi Fang lists Xuehai as a point that should not be needled or moxibusted if there is no disease.

Which meridian is SP10 on?

SP10 is a point on the Spleen Channel Meridian (Zú Tài Yīn Pí Jīng).

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⚠️ This page is for general education and is not medical advice. Acupuncture is a traditional practice; evidence varies by condition and study quality, and individual results differ. It does not replace diagnosis or treatment by a licensed professional. Always consult a qualified acupuncturist or physician.