De Quervain's tendinosis is a condition that causes pain, tenderness, and swelling along the thumb side of your wrist. The condition develops when the tendons.
Wrist and thumb pain. Wrist and thumb pain can be caused by: De Quervain's tenosynovitis; carpal tunnel.
It's a painful inflammation of tendons in your wrist and lower thumb. When the The pain may get worse when you move your thumb or wrist.