PC2 Celestial Spring

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

PC2 (Tianquan, “Celestial Spring”) is an acupuncture point on the Pericardium Channel Meridian. It is located on the anterior aspect of the upper arm, between the two heads of the biceps brachii muscle, 2 cun inferior to the anterior axillary fold when the arm is raised. It unbinds the chest, regulates Heart Qi, calms the spirit, and activates the channel to alleviate pain.

Location

On the anterior aspect of the upper arm, between the two heads of the biceps brachii muscle, 2 cun inferior to the anterior axillary fold when the arm is raised.

Needling

Perpendicular insertion, 0.5 to 1 cun. Caution should be exercised to avoid the brachial artery and median nerve which lie medial to the point.

TCM functions

Unbinds the chest, regulates Heart Qi, calms the spirit, and activates the channel to alleviate pain.

Indications

Heart disease, fullness and distention in the chest and hypochondrium, rebellious cough, pain in the chest, back, scapula, and the inner aspect of the arm, aversion to wind and cold, dim vision, foot pain preventing walking, stone water (a type of severe edema).

Clinical notes

Tianquan is a local point on the upper arm primarily used for conditions affecting the chest and the pathway of the Pericardium channel. Its indications for chest fullness, cough, and radiating arm pain make it useful for both cardiac and pulmonary issues, as well as for musculoskeletal pain along the medial arm. While not as commonly used as the distal points on the channel, it is effective for clearing stagnation and relieving pain in the chest and upper limb.

In the classical sources

Classical text; the translation was prepared with AI and is not clinical advice.

《醫學綱目·刺灸》 Yīxué Gāngmù · Cìjiǔ — Outline of Medicine: Needling and Moxibustion, Lou Ying, 1565 · 卷之八·陰陽臟腑部 · 穴法下 · Source: jicheng.tw ↗

天泉二穴,一名天溫,在曲腋下,去臂二寸,舉臂取之。 針入六分,灸三壯

According to this text, PC2 (two points, also called Tianwen) lies below the armpit fold, 2 cun down the arm, and is found with the arm raised; it is needled 6 fen with 3 moxa cones.

《類經圖翼》 Lèijīng Túyì — Illustrated Wings to the Classified Canon, Zhang Jiebin, 1624 · 卷七 · 經絡(五) · 手厥陰心包絡經穴 · Source: jicheng.tw ↗

天泉(一名天濕) 在曲腋下去肩臂二寸,舉臂取之。 刺六分,灸三壯。 一曰刺二分。 主治惡風寒,胸脅痛,支滿咳逆,膺背胛臂間痛

According to this text, PC2 (also called Tianshi) lies below the armpit fold, 2 cun down the upper arm, found with the arm raised; it is needled 6 fen (one view says 2 fen) with 3 moxa cones, and was used for aversion to wind and cold, chest and flank pain, propping fullness with cough and counterflow, and pain between chest, back, scapula and arm.

《普濟方·針灸門》 Pǔjì Fāng · Zhēnjiǔ Mén — Formulas for Universal Relief: Acupuncture & Moxibustion Section, Zhu Su, 1406 · 卷四百十三 · 針灸門 · 心包 · Source: jicheng.tw ↗

天泉(一名天濕。 在曲腋下二寸。 舉臂取之。 灸三壯。 主足不收

According to this text, PC2 (also called Tianshi) lies 2 cun below the armpit fold, found with the arm raised, receives 3 moxa cones, and was used for slack, uncontrollable feet.

On the Pericardium Channel channel

PC2 is one of 9 points on the Pericardium Channel Meridian. Nearby points:

Frequently asked questions

Where is PC2 located?

PC2 (Tianquan) is located on the anterior aspect of the upper arm, between the two heads of the biceps brachii muscle, 2 cun inferior to the anterior axillary fold when the arm is raised.

What is PC2 used for?

PC2 unbinds the chest, regulates Heart Qi, calms the spirit, and activates the channel to alleviate pain. Common clinical indications include heart disease, fullness and distention in the chest and hypochondrium, rebellious cough, pain in the chest, back, scapula, and the inner aspect of the arm, aversion to wind and cold, dim vision, foot pain preventing walking, stone water (a type of severe edema).

How is PC2 needled?

Perpendicular insertion, 0.5 to 1 cun. Caution should be exercised to avoid the brachial artery and median nerve which lie medial to the point.

Which meridian is PC2 on?

PC2 is a point on the Pericardium Channel Meridian (Xīnbāo 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.