What is a sprained knee? It is an injury that occurs due to a partial or total tear of some of the ligaments that are part of the knee and is more common than you can imagine.Athletes in all kinds of sports suffer from these often. Depending on the severity of the sprain, the injury can be easily treated or can be career ending for some pro-athletes. Diagnosing it early and taking immediate treatment to avoid further complications is fundamental.Today, we look at the most common types of sprains