TB5 Outer Pass

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

TB5 (Wàiguān, “Outer Pass”) is the Luo-connecting point of the Triple Burner Meridian. It is located 2 cun proximal to TB4, on the dorsal forearm, between the radius and ulna. It expels wind and releases the exterior, clears heat, activates the channel and alleviates pain.

Location

2 cun proximal to TB4, on the dorsal forearm, between the radius and ulna.

Needling

Perpendicular insertion 0.5-1.0 cun.

TCM functions

Expels wind and releases the exterior, clears heat, activates the channel and alleviates pain.

Indications

Febrile diseases, headache, tinnitus, deafness, pain in the hypochondriac region, motor impairment of the elbow and arm, tremor of the hand.

Luo-connectingConfluent of Yangwei

Clinical notes

TB5 is a powerful Luo-connecting point and the confluent point of the Yang Wei Mai, making it exceptional for releasing the exterior and expelling wind, particularly for wind-heat conditions like fever, headache, and sore throat. Its connection to the Yang Wei Mai allows it to regulate the exterior and interior, making it effective for conditions affecting the lateral aspect of the body. It is renowned for treating pain and immobility of the wrist and arm, and is often paired with GB41 to open the Dai Mai and treat hypochondriac pain.

On the Triple Burner channel

TB5 is one of 23 points on the Triple Burner Meridian. Nearby points:

Frequently asked questions

Where is TB5 located?

TB5 (Wàiguān) is located 2 cun proximal to TB4, on the dorsal forearm, between the radius and ulna.

What is TB5 used for?

TB5 expels wind and releases the exterior, clears heat, activates the channel and alleviates pain. Common clinical indications include febrile diseases, headache, tinnitus, deafness, pain in the hypochondriac region, motor impairment of the elbow and arm, tremor of the hand.

How is TB5 needled?

Perpendicular insertion 0.5-1.0 cun.

Which meridian is TB5 on?

TB5 is a point on the Triple Burner Meridian (Sān Jiāo).

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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.