Tendonitis is a repetitive stress injury...Emphasis on repetitive. Unless you are moving in and out of the uncomfortable position over and over again (though shoulders rolled back IS the anatomically correct position...we are all just slouches), it is not likely that you have developed tendonitis from this change in horns/ shoulder position. It could be a "straw that broke the camel's back" situation ie: you are right handed for your computer mouse, maybe your work involves repeated stress at the shoulder, you do the bulk of your driving with the right hand on the wheel, etc.
Three things that could be caused solely by a new position, and would present with the same type of pain and inflammatory response:
Bursitis: Our bodies are filled with fluid-filled sacs that cushion where tendons and other soft structures glide. These can become inflamed with unusual pressures.
Rotator cuff impingement syndrome: A pinching of sorts involving structures in the shoulder joint.
Brachial plexus injury: A stretch or impingement of any one of the large cluster of nerves coming through the area of your shoulder (think odd shoulder position plus the weight of a bari on a shoulder harness).
All of these are easy to research through the interwebz, and typically involve the similar treatments in mild cases (rest, ice/ anti-inflammatory meds, CHANGE IN HABITS, physical therapy and time).
Dogster's advice of sitting is a good one.
Three things that could be caused solely by a new position, and would present with the same type of pain and inflammatory response:
Bursitis: Our bodies are filled with fluid-filled sacs that cushion where tendons and other soft structures glide. These can become inflamed with unusual pressures.
Rotator cuff impingement syndrome: A pinching of sorts involving structures in the shoulder joint.
Brachial plexus injury: A stretch or impingement of any one of the large cluster of nerves coming through the area of your shoulder (think odd shoulder position plus the weight of a bari on a shoulder harness).
All of these are easy to research through the interwebz, and typically involve the similar treatments in mild cases (rest, ice/ anti-inflammatory meds, CHANGE IN HABITS, physical therapy and time).
Dogster's advice of sitting is a good one.
