ST-4 Dicang (地倉) — Earth Granary

With the eyes looking straight ahead, 0.4 cun lateral to the angle of the mouth, directly below the pupil.

Seated or supine, with the patient looking straight ahead, locate the point at the intersection of the vertical line through the pupil and the horizontal line through the angle of the mouth.

Orbicularis oris muscle. Innervated by branches of the facial nerve and the infraorbital nerve. Network of facial artery and vein.

Transverse (subcutaneous) insertion 0.5–1.0 cun, frequently directed toward ST-6.

Di (地), earth; Cang (倉), granary. The five grains grow from the earth. Grains enter the Wei (Stomach) through the mouth, as if entering a granary. The point lies at the corner of the mouth.