Subacromial Bursitis and Shoulder Pain Subacromial Bursitis is just one of the many conditions that can cause shoulder pain. The shoulder complex is no doubt the most complicated set of joint structures within the body. Hence, no wonder there is such a wide variety of conditions that impact shoulder mobility. The human body makes various tradeoffs, including mobility over stability. Shoulders are highly mobile yet at the cost of a wide range of joints and supportive structures. Although there are many types of Bursitis, the subacromial bursa of the shoulder is one of the most common. The bursa is a small fluid-filled cushion, which reduces friction between bones and other tissues. Bursae can become inflamed for many reasons, resulting in pain and reduced mobility. It is also easy to further irritate an inflamed bursa, especially in the shoulder. Hence, the condition can easily become chronic if left or if the wrong treatment strategy is applied. The full article on  Subacromial Bursiti