Insomnia, restlessness, palpitations, schizophrenia, etc.

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

Sit down. From the (TE-17) acupoint behind the ear, push backward to the depression below the mastoid process where the sternocleidomastoid muscle stops, and press where there is a sour and swollen sensation, which is where the acupoint is located.