Tendonitis Causes By far the most common cause of tendonitis is repeated stress -- using the same joints for the same stressful movements over and over again. That’s why serious athletes often develop ...

Medically reviewed by Laura Campedelli, DPT Key Takeaways Rest, ice, compression, and elevation help treat tendonitis at home.Overuse, like typing or running, often causes extensor tendonitis.Pain ...