Knee pain causes include tears in ligaments, arthritis, meniscus, inflammation of the kneecap tendon (tendonitis), osteoporosis, and rheumatoid arthritis.
Knee pains are one of the most common types of pain, in fact, 80 percent of those aged 45 and over suffer knee pain.
Knee pain can appear at any age, and not only in the elderly. Knee pain can appear as the result of injury, worn down cartilage, or due to a range of other medical conditions such as mechanical problems, arthritis and infections.
The main function of the knee is bending and straightening of the leg while bearing body weight together with the hips and the ankle. In order to perform all of these movements and support the body, the knee relies on several structures, bones, tendons and cartilages.
The Knee is Formed by 4 Bones that Make Up the Hinge Joint
These 4 bones are the thigh bone (femur), the tibia (shinbone), the fibula, and the kneecap (patella). In addition, the knee has four important ligaments that connect the thighbone to the calf. The anterior cruciate ligament (ACL) and the posterior cruciate ligament (PCL) provide stability. The medial collateral and the lateral collateral are situated along the inner and outer sides of the knee. In the connecting point between the thigh bone and the calf bone there are two disks – menisci – cartilage-like cells, which serve as the knee shock absorbers. These are also known as the medial (inner) and lateral (outer) menisci.



