Fractures of the long bone (hummers) in the upper arm occur most commonly as a result of a fall, although they can occasionally result from a direct blow. There will commonly be extreme pain accompanied by bruising and/or swelling at the site of the fracture. As with other arm injuries, hospital treatment is called for but first:
1. Seat the casualty.
2. Carefully position the affected arm across the casualty's chest and ask the casualty to support it in a position that they find comfortable.
3. Apply an arm sling and broad fold bandage.