Headaches, deafness, tinnitus, convulsions in children, vomiting, and diarrhea.
In the head, at the center of the mastoid process behind the ear, between the points Angle Vertex (TE-20) and Wind Screen (TE-17), at the intersection of the middle and lower one-third along the line connecting the helix of the ear. (This acupoint is bilateral, one on each side.)
Sit upright or lie on your side. The point where the hairline behind the ear is level with the opening of the external auditory canal is the location of this acupoint.