The knee contains two joints and their associated ligaments, which provide stability and flexibility. Knee pain is a common symptom that affects people of any ages. Injuries, mechanical problems, types of arthritis and other problems can cause knee pain.
It may start suddenly, often after an injury or exercise. Knee pain may also began as a mild discomfort, then slowly worsen. The location of the pain can help to identify the problem.
You should seek medical advice if you experience any of the following: swelling, deformity/abnormal shape, redness of the knee, fever, restricted movement of the knee.