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Causes. The shoulder joint is the most frequently dislocated joint of the body. Because it moves in several directions, your shoulder can dislocate forward, backward or downward, completely or partially, though most dislocations occur through the front of the shoulder. dislocated shoulder may be caused by: 1  Sports injuries. 2  Shoulder dislocation is a common injury in contact sports, such as football and hockey, and in sports that may involve falls, such as downhill skiing, gymnastics and volleyball. 3  Trauma not related to sports.
Dislocated kneecap: The kneecap slides out of position, causing knee pain and swelling. IT (iliotibial) band syndrome: The iliotibial (IT) band is a piece of tough tissue that runs from your hip down to the outer part of your knee. When you overdo activity, it can become inflamed over time. That causes pain on the outer side of the knee and is common in runners when going downhill. Loose cartilage: Sometimes, a knee injury can break loose cartilage. These pieces can get stuck in the joint, which causes pain and swelling. Many times people will have the sensation of âcatchingâ in the joint when they are active. Osgood-Schlatter disease: This condition happens when youâre young, when bones and other parts of the knee are still changing.