Wangu(SI4,腕骨) is an acupuncture point in the meridian named Taiyang Small Intestine Meridian of Hand. It is the Yuan-Source Point of the small intestine.
Wan, wrist; gu, bone.
The point is between the bones of the wrist.
In the depression between the base of 5th metacarpal bone and the triquetral bone.
Headache, nape rigidity, acute sprain of the lumbar, sciatic cholecystitis, pain in the wrist joint.
Perpendicularly 0.5-1 cun.