Joint pain is also called arthralgia. Joint pain can affect one or more joints and may be caused by many types of injuries or conditions. Rheumatoid arthritis causes stiff and painful joints. Osteoarthritis may involve degeneration of cartilage and growth of bone spurs. Joint pain may also be caused by bursitis-inflammation of the fluid filled sacs that help cushion bones. Physical Therapy can help with joint pain to provide protection tips and exercises to strengthen/stretch muscles around joints.