A young office assistant complains of wrist pain while in rest or holding a pen. She says it feels like her thumb locks up at times. It might be a condition called de Quervain's tendinosis. This article provides a brief overview of the condition. The condition called de Quervain's tenosynovitis causes pain on the inside of the wrist and forearm just above the thumb. It is a common problem affecting the wrist and is usually easy to diagnose.
This is particularly noticeable when forming a fist, grasping or gripping something, or when turning the wrist. Anatomy De Quervain's tenosynovitis affects two thumb tendons named abductor pollicis longus (APL) and the extensor pollicis brevis (EPB). The muscles connected to the APL and EPB tendons are on the back of the forearm. The muscles angle toward the thumb. The tenosynovium is a slippery covering that allows the two tendons to glide easily…
