Three bones meet to form the knee joint: femur, tibia, and patella. Cartilage is the shock absorber between the femur and tibia. Ligaments connect bones to other bones to hold them together and keep the knee stable.
Any direct contact to the knee or hard muscle contraction such as changing direction rapidly while running can injure knee ligaments. Common ligament tears include medial collateral ligament (MCL) tear which causes pain on the inside of the knee or a lateral collateral ligament (LCL) tear which causes pain on the outside of the knee.
The cartilage between the thighbone and shinbone are called meniscus. Meniscal tears may occur as a result of arthritis or aging or an awkward twist with movement.
- Catching or locking
- “Giving away”
- Limited range of motion
Arthritis is inflammation of one or more of the joints. The most common types of arthritis are osteoarthritis and rheumatoid arthritis.
- A difficulty with bending and straightening
- Pain with activity
- Grinding noise