De Quervain tenosynovitis is pain and swelling in the tendons around your thumb. Specifically, it affects the tendons of two muscles called abductor pollicis longus and extensor pollicis brevis. De ...
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 ...