Wan Gu (SI4)
📍 Location
On the ulnar side of the hand, in the depression between the base of the 5th metacarpal and the hamate bone.
🏥 Indications
Yuan-source point of the small intestine: stiff head/neck, tinnitus, jaundice, heat disease, finger contraction, wrist pain, and wasting-thirst.
🖐️ Stimulation method
Perpendicular insertion 0.3–0.5 cun.
⚠️ Contraindications
No special contraindications.