Trauma to the knee can tear the menisci (pads of connective tissue that act as shock absorbers and also enhance stability). Cartilage tears can often occur with sprains. Treatment may involve wearing a brace during an activity to protect the knee from further injury. Surgery may be needed to repair the tear.
Arthritis is the inflammation of one of more of your joints which may cause swelling, stiffness, or pain. Common symptoms of knee arthritis are stiffness and swelling in the knee, weakness or buckling in the knee, pain from vigorous activity, or creaking, clicking, snapping, or grinding noises caused by loose cartilage in the knee. While there is no cure for arthritis, there are many treatments to ease the pain such as physical therapy, assistive devices, medications, and surgical treatment.
Knee ligament tears sprains or tears are a common sports injury. The knee ligament is easily injured; any direct contact to the knee or a hard muscle contraction, such as quickly changing directions while running, can cause a ligament injury. Ligament injuries will require different degrees of surgery depending on how sever the injury. Some injuries may require early surgery to avoid the injury getting worse over time. Additionally, multiple ligament injuries may require more than one operation to treat.