Obliquely in a lateral direction or vertically 0.3–0.5 cun.
Or apply penetration method: transversely 1.5–2 cun in cases of facial paralysis towards Jiache ST-6. In case of trigeminal neuralgia needle towards Yingxiang LI-20.
Caution: Facial artery/vein.
Furthermore, it is also effective in expelling Interior Wind, characterized by post Wind-stroke symptoms such as facial paralysis, eye or mouth deviation, mouth drooling, inability to close eye.
It also opens the Channel by removing Obstructions on face. Typical manifestations are cheek pain or toothache.
Finally Dicang ST-4 has positive influence over facial muscles and can be used to treat aphasia.