Points Database

: Jiachengjiang : Adjacent to Container of Fluids

Ex-HN-18 : Extra Head/Neck 18

1 cun lateral to Chengqiang Ren-24, over the mental foramen.

Perpendicular-oblique insertion medially and inferiorly into the mental foramen 0.3 - 0.5 cun, or transverse insertion 0.5 - 1.5 cun

TCM Actions:
Eliminates wind, activates the channel and alleviates pain

TCM Indications:
  • Deviation of the mouth and eye, pain of the face, toothache, swelling of the gums, jaundice.

    Superficial Innervation: Mental nerve, branch of mandibular from trigeminal nerve (CN V3)
    Dermatome Segment: CN V3 mandibular branch of trigeminal

    Mainly used for facial paralysis and trigeminal neuralgia.

    This point would also be on the upper trajectory of the Chong mai in Jeffrey Yuen's descriptions (Yuen, 2005, The Extraordinary Vessels).

    In Tung acupuncture two points called Shui Tong, Water Through, and Shui Jin, Water Metal, are located near this point. Shui Tong is located 0.4 cun below the outer corner of the mouth and Shui Jin is located 0.5 cun medial to Shui Tong. They are indicated for Wind-Cold-Damp Bi of the lower back, Kidney deficiency and breathing difficulties, presumably due to a failure of the Kidneys to grasp Lung Qi (Chu, 2015).

    Reference Notes: (click to display)