Shoulder pain can come from a number of sources. The two main causes of shoulder pain include: Injury to muscles and/or tendons from prolonged overuse — for example, performing a repetitive activity like painting for too long. Muscles and/or tendons pinched between bones or ligaments, also known as impingement. This may happen during activities with “power strokes” like tennis, swimming, or throwing a ball. Both types of injury can cause a steady ache in the shoulder with bursts of sharper pain in certain positions. A third possible cause of shoulder pain is a heart attack — pain can appear throughout … Continue reading →