The degeneration process causes tendons to thicken. They're less elastic and don't function properly. "If there's continued stress on the tendon you can end up with inflammation on top of that," says Dr. King. This can explain why some people with tendon problems who are treated with NSAIDs or a corticosteroid injection may get better for just a couple of weeks. "The pain came back because there was an underlying degenerative problem within the tendon," says Dr.King.