ST45 Severe Mouth

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

ST45 (Lidui, “Severe Mouth”) is the Jing-Well (Metal) point of the Stomach Meridian. It is located on the lateral side of the second toe, 0.1 cun posterior to the corner of the nail. It clears heat, revives consciousness, calms the Shen.

Location

On the lateral side of the second toe, 0.1 cun posterior to the corner of the nail.

Needling

Perpendicular or oblique insertion 0.1-0.2 cun, or prick to bleed.

TCM functions

Clears heat, revives consciousness, calms the Shen.

Indications

Facial swelling, toothache, sore throat, epistaxis, mental disorders, febrile diseases, dream-disturbed sleep.

Jing-Well (Metal)

Clinical notes

As the Jing-Well (Metal) point, ST45 is primarily used for clearing heat, reviving consciousness, and calming the Shen, especially in acute, severe conditions. It is indicated for manic-depressive disorders, nightmares, and insomnia due to Stomach heat disturbing the Shen. It can be used for local toe pain and swelling. Pricking to bleed is a common technique for acute heat conditions.

On the Stomach channel

ST45 is one of 45 points on the Stomach Meridian. Nearby points:

Frequently asked questions

Where is ST45 located?

ST45 (Lidui) is located on the lateral side of the second toe, 0.1 cun posterior to the corner of the nail.

What is ST45 used for?

ST45 clears heat, revives consciousness, calms the Shen. Common clinical indications include facial swelling, toothache, sore throat, epistaxis, mental disorders, febrile diseases, dream-disturbed sleep.

How is ST45 needled?

Perpendicular or oblique insertion 0.1-0.2 cun, or prick to bleed.

Which meridian is ST45 on?

ST45 is a point on the Stomach Meridian (Zú Yángmíng Wèijīng).

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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.