Most of us have had an instance where we stepped funny and twisted our ankle or knee, maybe stretched our shoulder too far, or tripped and injured our wrist. These are examples of an acute injury. Acute injuries are usually the result of a single traumatic event. This is in contrast to a chronic injury that occurs with repetition and over time. Swelling is a common occurrence after injury. Swelling is a normal reaction to injury; however, the swelling reaction is excessive sometimes. Let’s look at what happens when your body has swelling after an injury.