Vertically 0.3–0.5 cun.
Wanggu SI-4 is mostly used to remove Channel obstruction along the Small Intestine Channel, especially around the wrist, elbow and neck. In fact, it is often stimulated to treat the pattern of Painful Obstruction Syndrome and ease stiffness and pain in the fingers, wrist, arm, elbow, neck, shoulder, head as well as lateral costal region.
Another function is to remove Damp-Heat. Thus it treats jaundice and febrile diseases.