No standard contraindications, but it is a vascular area (prone to hematoma). Caution: branches of the frontal nerve, the facial nerve, and blood vessels. Moxibustion is contraindicated according to most texts.
📍 Location (classical)
On the face, in the depression at the medial end of the eyebrow, directly above the inner canthus of the eye.
🧭 How to find it (practical)
With the head at rest or in dorsal decubitus, locate the point approximately 0.1 cun lateral to the medial end of the eyebrow.
🔬 Anatomy
Corrugator supercilii and frontalis muscles. Innervated by the frontal nerve (ophthalmic branch of the trigeminal) and the supratrochlear nerve.
💉 Needling
0.3–0.5 cun obliquely from lateral to medial, or transversely (subcutaneous); transverse-oblique insertion inferiorly toward BL-1; or prick to bleed in Heat disorders.
📜 Etymology
Zan (攒), to gather; Zhu (竹), bamboo. The point lies at the medial end of the eyebrow, a location that resembles a lush bamboo grove.
