Excessive knee flexibility or a feeling of looseness may be an early warning sign of arthritis, experts say. While arthritis ...

When you feel your knee is giving out, meaning that suddenly the knee feels unstable, it is usually due to a ligament injury. A ligament is a short, tough band of tissue that connects two bones. In ...

Knee dislocation can be caused by a sudden blow, such as taking a hard hit playing a contact sport like football or hockey, or by a chronic condition, such as a stretched ligament. Some people have a ...