Headache, dizziness, eye diseases, tinnitus, insomnia.

At the point 1 cun posterior to the midpoint of the line connecting Wind Screen (TE-17) and Wind Pool (GB-20) acupoints. (This acupoint is a pair, one on each side)

Sit or lie face down. Press the earlobe backward, from the edge directly opposite the earlobe, press to find a depression (which is more pronounced when opening the mouth), then measure 1 transverse finger backward, and press where there is a sour and swollen sensation, which is where the acupoint is located.