More than half of the population is affected by a common problem known as Knee Pain. It can affect people of any age. Knee pain is a common problem in knees that originates in any part of kneecap, knee joint, tendons, ligaments, & cartilage. It can be aggravated by obesity or physical activities. This pain may result in an injury like torn cartilage or a ruptured ligament. The other medical conditions related to knee pain are gout, infections, and arthritis. Knee pain can cause physical restrictions.