SP18 Celestial Stream

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

SP18 (Tianxi, “Celestial Stream”) is an acupuncture point on the Spleen Channel Meridian. It is located on the chest, in the fourth intercostal space, 6 cun lateral to the anterior midline. It unbinds chest, regulates qi, benefits breasts.

Location

On the chest, in the fourth intercostal space, 6 cun lateral to the anterior midline.

Needling

Oblique insertion 0.5-1 cun. Caution for pneumothorax.

⚠ Pneumothorax risk: oblique/shallow only, never deep perpendicular over the chest wall.

TCM functions

Unbinds chest, regulates qi, benefits breasts.

Indications

Chest pain, mastitis, insufficient lactation, cough.

Clinical notes

SP18 is highly regarded for its ability to unbind the chest and benefit the breasts, making it a primary point for mastitis, breast pain, and insufficient lactation. It also regulates qi and alleviates pain in the chest and lateral costal region. Its name, 'Celestial Stream,' suggests its role in promoting the smooth flow of qi and fluids in the upper body. It is frequently combined with SI1 (Shaoze) for promoting lactation.

On the Spleen Channel channel

SP18 is one of 21 points on the Spleen Channel Meridian. Nearby points:

Frequently asked questions

Where is SP18 located?

SP18 (Tianxi) is located on the chest, in the fourth intercostal space, 6 cun lateral to the anterior midline.

What is SP18 used for?

SP18 unbinds chest, regulates qi, benefits breasts. Common clinical indications include chest pain, mastitis, insufficient lactation, cough.

How is SP18 needled?

Oblique insertion 0.5-1 cun. Caution for pneumothorax. Caution: ⚠ Pneumothorax risk: oblique/shallow only, never deep perpendicular over the chest wall.

Which meridian is SP18 on?

SP18 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.