On the lower jaw, about 1 cun lateral to the midpoint of the mentolabial furrow (foramina mentale of the jawbone).
Sit down and lie back, first find Chengjiang, about a horizontal point offside of the Chengjiang, use the tip of the finger press and can feel a sense of depression, the place where the depression is Jiachengjiang.
- Mental nervous system diseases: hemifacial spasm, facial paralysis, trifacial neuralgia.
- Others: Cheek swelling, stomatitis, gingivitis, acute pulpitis, periapicalitis,etc.
Perpendicular insertion 0.2~0.5 cun. Moxibustion is applicable.