What happens when you feel pain in your knees?

Most knee problems are due to ageing, although some are also caused by injury. — TNS

In order to understand what causes pain in your knee, we have to understand what is inside your knee.

The knee is a joint that is prone to a lot of injury because it bears huge stress from the weight of your body and from the activities that you perform every day, such as walking, kneeling, squatting, climbing and lifting heavy weights.