Shoulder impingement is a condition that causes pain and pinching sensation in the shoulder. It can also decrease a person’s range of motion. Anyone can get shoulder impingement, but people with certain risk factors are more likely to develop it. Some common risk factors associated with shoulder pain include:
Overuse. People who participate in sports that require frequent and repetitive use of the arms and shoulders, such as baseball, swimming, tennis, and football, are at higher risk of developing shoulder impingement.
Curved or hooked acromion. Some people’s natural anatomy makes them more likely to develop shoulder impingement. People who have curved or hooked acromion bones typically have a smaller sub acromial space than a person who has a flat acromion.
Prominent coracoid. The coracoid is a small projection from the shoulder blade. Like people who have hooked or curved acromions, some people have prominent coracoids. These people are more susceptible to another, less common type of shoulder impingement called sub coracoid impingement.
Shoulder instability. Shoulder instability refers to when shoulder muscles, tendons, and ligaments no longer secure the shoulder joint causing pain. As a result, the shoulder is prone to partial dislocation, dislocation, and other conditions, such as shoulder impingement.
Previous shoulder injuries. People who have sustained injuries to the shoulder joint, such as a torn labrum, may be at risk for developing shoulder impingement in the future.
Bone spurs. Bone spurs are projections that can cause the sub acromial space to narrow and become smaller. As a result, there is less room for tendons and other soft tissues, making impingement more likely.
Poor posture. Posture while reading, sitting at a desk, driving, or cooking, can play a role in the development of shoulder impingement. Hunching or slumping the shoulders can cause the narrowing of the space between the acromion and rotator cuff.
Age Shoulder impingement is most often seen in adults over the age of 50, although it can develop at any age.