Bursitis
This is inflammation of the bursae. They are small sacs that surround and protect the joints. Bursae provide cushion to the joints because they prevent excessive friction between bones and the surrounding muscles. Thus, repetitive movements or heavy use of the shoulder articulation causes swelling to the bursa in the area located between the rotator cuff and the shoulder blade’s acromion. In many cases, tendinitis is also associated with pain. Thus, the most common type of bursitis is called subacromial bursitis, and it is usually accompanied by tendinitis.