It is the tendons that connect muscle to bone and often connect near a joint. Tendinopathy refers to injury to the tendon. It can lead to pain and swelling and movement can become very difficult. Tendinopathy may be:
Tendonitis — inflammation of the tendon (not very common)
Tendinosis — tiny tears in the tendon with no significant inflammation (more common)
Shoulder consists of many tendons. They are connected to muscles of rotator cuff and biceps muscle of the arm. If you have tendinopathy, it means your tendons are inflamed, irritated or torn.
Over use of the muscle and tendon is the main reason for tendinopathy. Constant strain on the tendons causes the structure of the tendon to change. The condition can set in over a period of time. It can be the result of involving in activities that require lifting your arm over your head, sleeping on your shoulder every night, repeated throwing or keeping your shoulder in one position for a while.
It should be noted that shoulder tendinopathy can also occur on account of injury to the tendon from: