It is one of most common ligament injury. Is usually develops when ankle gets twisted.

Ligaments are soft tissue structures which connect bones together and stabilize the joint. Sprain occurs when ligaments are forced beyond their normal range.

Causes
A meniscus tear can result from any activity that causes you to forcefully twist or rotate your knee, such as sudden stops and turns while playing. Even kneeling, deep squatting or lifting something heavy can sometimes lead to a torn meniscus.

In older adults, degenerative meniscal tear can develop with little or no trauma.

Shoulder is the most common joint in the body to dislocate. Due to its ball and socket design we have a great deal of mobility within the shoulder, which is directly at the cost of stability.

Shoulder joint socket is formed by bony glenoid and labrum attached to it, while ball is formed by head of humerus (arm bone). Shoulder dislocates anteriorly far more commonly than posterior. Glenoid labrum is crucial stabilizing factor that tears when shoulder dislocates. It is known as Bankart tear or Bankart lesion. When shoulder dislocates it leads to cuticle depression injury on posterolateral portion of head of humerus known as Hill sach’s lesion.