When assessing a second degree sprain, what symptom is most likely to be observed?

In a second-degree sprain, the ligament is partially torn, which leads to more significant symptoms compared to a first-degree sprain. Severe swelling and bruising are commonly observed due to the involvement of blood vessels and tissue damage. The swelling occurs as a result of inflammation and the accumulation of fluid in the affected area, while bruising may indicate bleeding within the tissue from damage to small blood vessels.

Mild discomfort only would generally be associated with a first-degree sprain, where the injury is less severe and the ligament is stretched but not torn. Complete immobility of the affected area suggests a more severe injury, such as a third-degree sprain, where the ligament is completely torn. Minimal pain during movement is also indicative of a mild injury and would not align with the expected symptoms of a second-degree sprain, which typically involves notable discomfort during movement. Thus, the presence of severe swelling and bruising is a significant indicator of a second-degree sprain.