TB20 Angle of the Apex

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

TB20 (Jiǎosūn, “Angle of the Apex”) is an acupuncture point on the Triple Burner Meridian. It is located directly superior to the apex of the ear, within the hairline. The point is found in a depression that forms when the mouth is opened. It clears heat, benefits the ear, eyes, and teeth, and relaxes the sinews of the neck.

Location

Directly superior to the apex of the ear, within the hairline. The point is found in a depression that forms when the mouth is opened.

Needling

Subcutaneous insertion 0.3-0.5 cun, often directed towards the site of pain or pathology (e.g., anteriorly for TMJ, posteriorly for mastoiditis).

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TCM functions

Clears heat, benefits the ear, eyes, and teeth, and relaxes the sinews of the neck..

Indications

Swollen gums, inability to chew, dental caries pain and swelling, film or growth on the eye, fullness and stiffness of the neck and jaw, upper toothache, infantile canker sores..

Clinical notes

Jiaosun is a key local point for disorders of the ear, teeth, and temporomandibular joint. Its location at the intersection of three yang channels makes it effective for clearing heat and alleviating pain in the upper jaw, gums, and side of the head. It is particularly noted in classical texts for treating swollen gums and difficulty chewing. Modern use often extends to treating local conditions like otitis media, tinnitus, and TMJ dysfunction.

On the Triple Burner channel

TB20 is one of 23 points on the Triple Burner Meridian. Nearby points:

TB15TB16TB17TB18TB19TB21TB22TB23

Frequently asked questions

Where is TB20 located?

TB20 (Jiǎosūn) is located directly superior to the apex of the ear, within the hairline. The point is found in a depression that forms when the mouth is opened.

What is TB20 used for?

TB20 clears heat, benefits the ear, eyes, and teeth, and relaxes the sinews of the neck. Common clinical indications include swollen gums, inability to chew, dental caries pain and swelling, film or growth on the eye, fullness and stiffness of the neck and jaw, upper toothache, infantile canker sores.

How is TB20 needled?

Subcutaneous insertion 0.3-0.5 cun, often directed towards the site of pain or pathology (e.g., anteriorly for TMJ, posteriorly for mastoiditis). Caution: The Zhen Jiu Ju Ying lists this as a point to be avoided for needling in the 'Forbidden Points Song' (禁針穴歌).

Which meridian is TB20 on?

TB20 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.