Ligaments are a type of tissue which are tough but flexible. Bundles of individual fibres come together to form a ligament. A ligament tear is common to athletes especially in knees and ankles, as the weight of the body falls on them. They are always under high stress and can be easily injured if not careful.
Ligaments connect the bones and are strained when the joint is stressed beyond its normal range. Common causes of a ligament injury include twisting your ankle or landing awkwardly on your feet. Sometimes the ligaments around a particular joint are stretched beyond their normal capacity. They tear away from the bone, which causes the injury.