Shoulder and arm pain, stiff neck pain, as well as periarthritis of the shoulder joint, etc.
In the scapular region, midway between Shoulder Well(GB-21) and Crooked Wall(SI-13), at the upper angle of the scapula; or at the midpoint of the line connecting the two acupoints, Shoulder Well(GB-21) and Crooked Wall(SI-13). (This acupoint is bilateral, one on each side.)
Step 1: Sit upright or lie face down. Step 2: You can feel a triangular bone on the back (the scapula); Step 3: At its upper inner corner, the spot that feels sore when pressed is the location of this acupoint.