Conditions

Arthritis is a condition that causes pain, stiffness and swelling in the joints. Osteoarthritis is a common form of arthritis caused by the wearing down of the cartilage that protects the bones of a joint. Rheumatoid arthritis is an autoimmune condition caused by an inflammation in the lining of the joints. Both forms of arthritis cause pain, tenderness, and swelling, and may result in loss of movement in the affected joints. Over time, joints affected by arthritis may become severely damaged. Arthritis occurs more frequently in older individuals, however it sometimes develops in athletes from overuse of a joint or after an injury. It can however, affect people of any age, including children.

Cartilage defects of the knee involve damage to the articular cartilage, the smooth substance that covers the ends of the bones, keeping them from rubbing together. Cartilage defects may be degenerative, resulting from wear and tear, or traumatic, caused by an injury such as falling on the knee, jumping down, or rapidly changing directions while playing a sport. Such injuries do not always produce immediate symptoms because there are no nerves in cartilage. Over time, however, cartilage defects can disrupt normal joint function, leading to pain, inflammation, a grinding sensation in the knee and limited mobility.

The meniscus is a C-shaped piece of tough cartilage located in the knee, that acts as a shock absorber between the shinbone and the thighbone. There are two minisci within each knee. The meniscus on the inside part of the knee is known as the medial meniscus and the meniscus located on the outside of the knee is referred to as the lateral meniscus. A meniscus tear may be the result of an activity that forcefully twists or rotates the knee. A torn meniscus is a common knee injury that may be caused by playing sports, or a traumatic injury, and most frequently occurs when the knee joint is bent and the knee is then twisted. Torn menisci are common in athletes, but in some cases this condition may occur in older adults whose cartilage has...

Bursitis is a painful inflammation of a bursa, one of the small sacs at the joints that cushion the tendons, muscles and bones. Bursae normally enable fluid movement, but when overtaxed they can inflame and fill with fluid. Once a bursa becomes irritated, gritty and rough, it can create painful friction in the joint. Bursitis usually results either from repetitive stress or sudden injury and presents with swelling, redness and deep, aching pain. The joints most commonly affected by bursitis are the shoulder, elbow, hip and knee.