Torn Anterior Cruciate Ligament
You hear a pop and can’t move your knee after you are hit by a trauma while playing soccer, football, or ball. You may have torn your ACL, which interfaces the femur and the tibia and keeps the tibia from moving excessively far forward. Your knee will damage and expand and feel flimsy.
You can tear or strain any of the tissues that hold your knee together: Ligaments interface unresolved issues other; ligaments associate muscle to bone. Bothered ligaments from utilizing them to an extreme? That is tendinitis.