What causes de Quervain’s tendinosis?

What causes de Quervain’s tendinosis?

De Quervain’s tendinosis can be triggered by several factors, including:

• Overuse.
• A direct blow to the thumb.
• Repetitive grasping.
• Inflammatory conditions (including arthritis).

Activities that require a sidewise motion of the wrist while you are gripping with the thumb can aggravate this condition. Hobbies and sports that use this motion include:

• Lifting young children.
• Gardening.
• Racquet sports (tennis, racquetball).
• Skiing.
• Using a hammer.

Often, the exact cause of de Quervain’s tendinosis is unknown.