Principles of closed reduction (see illustration)
Axial traction on the arm is almost always helpful. Even with a fracture of the proximal humerus there is usually sufficient intact soft tissue so that the traction is transmitted to the humeral head.
Direct manipulation of the dislocated head segment can assist the reduction. Pressure should be applied over the prominent humeral head, and directed to push it back into the glenoid. Beware pressure on neurovascular structures.