What are the signs and symptoms of a Grade 3 sprain?

A Grade 3 sprain is characterized by a complete tear of the ligament involved, which results in significant symptoms. The correct choice highlights extreme pain, severe instability, and swelling. The extreme pain is typically due to the injury of the ligament and the surrounding tissues, while the severe instability arises because the ligament can no longer effectively support the joint. Swelling occurs due to inflammation as the body responds to the injury and increased fluid accumulates in the area.

This combination of signs and symptoms is crucial for distinguishing a Grade 3 sprain from lower grade sprains. Lower grade sprains, such as Grade 1 or Grade 2, typically involve milder symptoms like relatively less pain, more manageable swelling, and varying degrees of instability, which makes the correct identification essential for appropriate management and rehabilitation strategies.