Injuries to the knee can range from chronic conditions such as patellar tendonitis, arthritis, and chondromalacia to more severe injuries that include dislocations, ligament sprains, and meniscus tears. Meniscus and ligament tears of the ACL, MCL, LCL, and PCL may require knee surgery. After an injury or surgery, doctors and therapists often prescribe a knee brace, patella support, or compression sleeve to help improve stability, protect the knee, reduce pain and swelling, and prevent further injury. Fitness equipment can be used to improve knee joint proprioception and leg muscle strength. A cold compression device like the Aircast Knee Cryo/Cuff is beneficial for swelling and pain reduction after knee surgery and injuries.