Vital Spot No: 45
This point is located on the side of the rib cage, just under the armpit between the muscles of the chest and back (fourth intercostal space).
A strong blow will result in trauma to the lungs and associated nerves, which will result in difficulty breathing.
This point can also be gouged to good effect. Digging into this area with a single knuckle, and then moving it up and down whilst maintaining pressure, will cause the opponent considerable pain.