One of the most noticeable symptoms of an acute muscle injury is swelling. Depending on the muscle injured, you may have lumps on both ends of the muscle. The swelling occurs as a result of inflammation. In most cases, the swelling is localized and increases with time. It will only reduce when the injuries are treated. Widespread swelling is also possible for certain injuries, especially if they involve multiple muscle groups. If the muscle fiber tears, your muscle may thin thus causing a depression. As a result, the adjacent muscle may punch up. Due to swelling, some injuries may be difficult to diagnose through physical observation.Next