The human knee is a marvel. Although it is an incredibly complex and sturdy structure, it also is more prone to injury than any other bony structure besides the spine.
Common causes of knee pain:
- Arthritis of the knee – Arthritis most often causes problems with the knee joint but also can affect other structures such as muscles, tendons, and ligaments. Osteoarthritis, the most common form of arthritis in the knee, is caused by the gradual degradation of the cartilage in the joint. Rheumatoid arthritis causes the joint to become inflamed and can often cause destruction of the surrounding cartilage. A deformity often leads to arthritis in the knee, but more often, obesity or excess weight, or repetitive stress injuries from sports, are the culprit. Symptoms include stiffness or locking joints.
- Cartilage injuries including chondromalacia patella, a softening of the knee cap cartilage. This disorder occurs most often in runners, skiers, cyclists, and soccer players.