SI18 Cheekbone Crevice

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

SI18 (Quanliao, “Cheekbone Crevice”) is an acupuncture point on the Small Intestine Channel Meridian. Situated directly below the outer canthus, in the depression on the lower border of the zygoma. It eliminates wind and alleviates pain.

Location

Situated directly below the outer canthus, in the depression on the lower border of the zygoma.

Needling

Perpendicular or oblique insertion 0.3-0.5 cun.

TCM functions

Eliminates wind and alleviates pain.

Indications

Facial paralysis, toothache, swelling of the cheek, twitching of eyelids.

Clinical notes

SI18 is a key local point for facial disorders, particularly those affecting the cheekbone and jaw. It is highly effective for facial paralysis, trigeminal neuralgia, and toothache, especially in the upper jaw. Its ability to eliminate wind and alleviate pain makes it a go-to point for wind-cold or wind-heat induced facial pain and swelling. It is frequently needled towards ST7 for temporomandibular joint (TMJ) disorders.

On the Small Intestine Channel channel

SI18 is one of 19 points on the Small Intestine Channel Meridian. Nearby points:

Frequently asked questions

Where is SI18 located?

Situated directly below the outer canthus, in the depression on the lower border of the zygoma.

What is SI18 used for?

SI18 eliminates wind and alleviates pain. Common clinical indications include facial paralysis, toothache, swelling of the cheek, twitching of eyelids.

How is SI18 needled?

Perpendicular or oblique insertion 0.3-0.5 cun.

Which meridian is SI18 on?

SI18 is a point on the Small Intestine Channel Meridian (Shǒu Tài Yáng Xiǎo Cháng 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.