Leg joint pain can be caused by many factors. Arthritis is the most common cause of leg pain. This condition causes severe pain. This could also be due to a physical injury. A sprain, although not serious, is quite common and can cause a lot of pain. Leg joint pain can be caused by swelling in cells that are filled with a fluid called bursa. Bursae is a cushioning system that cushions very soft tissues between bones. They are responsible…