Chest fullness, rib pain, swelling in the armpit, and arm pain with inability to lift.

On the lateral side of the chest, when the arm is raised, on the mid-axillary line, 3 cun under the armpit, in the interspace of the 4th rib. (This acupoint is bilateral, one on each side.)

Lie on your side and raise your arm. Push straight down along the mid-axillary line to the intercostal space where the nipple is located (i.e., the 4th intercostal space), and press where there is a sensation of soreness and swelling; this is the location of this acupoint.