The arm extends from the shoulder to the wrist, including the upper arm and forearm. Different muscles may work together in intricate ways to help the arm, wrists, fingers, and hands function. Knowing ...

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 ...