Request an AppointmentDe Quervain's tenosynovitis (also called de Quervain's disease) is a condition that affects tendons that attach to two muscles of the thumb—extensor pollicis brevis and abductor pollicis longus.1 This condition typically develops from repetitive use of the thumb for activities such as twisting and pinching, but the cause is not always known.
Source: Verywell Health
