Arthritis is inflammation of one or more of your joints. Pain, swelling, and stiffness are the primary symptoms of arthritis. Any joint in the body may be affected by the disease, but it is particularly common in the knee.
Bursitis of the shoulder (impingement syndrome) occurs when there is swelling and redness between the
top of the arm bone and the tip of the shoulder Between these bones lie the tendons of the rotator cuff and a fluid-filled sac called the bursa, which protects the tendons.