Chengiang (Ren 24) Location: In the depression in the center of the mentolabial groove. Indications: Facial puffiness swelling of the gums, toothache, salivation, mental disorders, deviation of the eyes and mouth. Method: Puncture obliquely upward 0.2-0.3 inch. Moxibustion is applicable. Regional anatomy Vasculature: The branches of the inferior labial artery and vein. Innervation: The branch of the facial nerve.

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