What is "tendonitis"?
Tendonitis is an inflamation problem that happens to a tendon. A tendon is the connection between a muscle and a bone. Tendonitis is, more frequently, caused by repetitive stress movements through that muscle onto the bone. So if there's a particular movement- an example that comes to mind are people that work on an assembly line, where they're doing the same movement thousands and thousands and thousands of times, every day, five days a week. If there's a particular weight they're having to lift, and they're moving that arm in the same position over and over and over again then they put alot of stress on that tendon, many many many times. And over time they develope tiny little microscopic tears in the tendon. Because of those tears the tendon starts to swell. You get a chronic inflammatory swelling around the tendon, and that can be very painful. There are pain receptors in a tendon, and once that tendon starts to suffer from that particular movement that's putting undue stress on it then it begins to swell and becomes painful and thats what we call tendonitis.