tendinosis

Tendinosis is a condition characterized by the progressive degeneration of a tendon, often due to chronic overuse. Unlike tendinitis, which involves inflammation, tendinosis typically presents with pain and stiffness but little to no inflammation. This condition involves fraying or tearing of the tendon's fibrous tissue.1

It can affect various tendons, such as the quadriceps or Achilles tendon, and is a common issue in rotator cuff injuries, particularly in older adults or those with repetitive strain on the shoulder. Activities involving repetitive wrist extension, like playing tennis, can also lead to tendinosis in the elbow, commonly known as tennis elbow.123