The common causes of <span style = 'background-color: #dae8f4'>knee</span>
pain are injury, degeneration, arthritis, infection, and rarely bone tumors. Athletic injuries and trauma are few risk factors for knee
pain. Ligament injuries, meniscal tears, runner’s knee
, tendinitis and fractures are common causes of knee
pain. Osgood Schlatter disease is a condition seen in teenage boys and girls which causes a painful bump below the knee
. It's usually caused by overuse and irritation of the tendon. The pain comes and goes.