Knee and shoulder injuries are often caused by overuse, trauma, or degeneration. ACL tears are common knee injuries that can occur during sports that involve sudden stops or changes in direction. Rotator cuff tears are common shoulder injuries that can occur from repetitive overhead motions or trauma. Dislocated shoulders can occur from a fall or direct blow to the shoulder. It's important to seek medical attention if you experience persistent pain, swelling, or limited mobility. Recovery time varies depending on the severity of the injury and can range from a few weeks to several months. Remember to always listen to your body and seek medical attention if you have any concerns.