De Quervains Tendinitis
De Quervain’s Tendinitis is the inflammation of the tendons around the base of the thumb. Irritation and thickening of the tendons can cause pain and discomfort along the thumb site of your wrist. The pain or discomfort is noticeable especially when turning the wrist, forming a fist or grasping an object. This condition is usually seen commonly in middle-aged women.
Two main tendons of the thumb run side by side through a tunnel (or series of pulleys) along the thumb side of the wrist. These tendons run through a layer called synovium - a layer that allows easy sliding of the tendons. Any swelling of the tendons can put pressure on the nerves, this will cause pain or numbness of the wrist.