Which symptom is NOT typically associated with a medial collateral ligament (MCL) injury?

The symptom of a skin rash is not typically associated with a medial collateral ligament (MCL) injury. MCL injuries often occur due to trauma or stress on the knee, leading to specific physical signs and symptoms related to the injury itself. Commonly seen symptoms include swelling, pain, and stiffness around the knee, as these are direct results of damage to the ligament and the surrounding tissues.

Swelling arises from inflammation and fluid accumulation in response to the injury. Pain is directly linked to the injury and occurs when the ligament is stressed or damaged. Stiffness often develops as the body protects the injured area and can be exacerbated by swelling and inflammation. In contrast, a skin rash indicates a different underlying issue, such as an allergic reaction, infection, or dermatological condition, which does not relate to the structural injury of the MCL. Thus, a skin rash is not a symptom associated with an MCL injury.