Deep insertion may cause an electric-shock sensation owing to the facial nerve.
📍 Location (classical)
Posterior to the earlobe, in the depression between the mastoid process and the angle of the mandible.
🧭 How to find it (practical)
Seated or in lateral decubitus, with the earlobe folded slightly inward, the point is located anterior to the mastoid process.
🔬 Anatomy
The external jugular vein, the great auricular nerve, the trunk of the facial nerve (located more deeply at its emergence from the stylomastoid foramen), and the posterior auricular artery.
💉 Needling
Insert the needle 0.5 to 1 cun toward the contralateral eyeball (to treat facial paralysis).
📜 Etymology
Yi (翳), verb meaning to shelter, hide, protect; Feng (風), pathogenic wind. The point lies behind the earlobe in a location sheltered from pathogenic wind.
