Final answer:
After a fall, inflammation occurs in the damaged tissue, causing swelling.
Step-by-step explanation:
After a fall, a client's arm may begin to swell due to inflammation. This is a process that involves the release of chemical signals called cytokines by cells in the damaged tissue. These cytokines attract white blood cells to the site of injury. Consequently, the local blood capillaries dilate, allowing more fluid to move from the capillaries into the damaged tissue. As a result, swelling occurs.
Learn more about swelling after a fall