Cause of De Quervain's syndrome

The cause of de Quervain's disease is not known. In medical terms, it remains idiopathic.

Some claim that this diagnosis should be included among overuse injuries and that repetitive movements of the thumb are a contributing factor. More specifically, repetitive eccentric lowering of the wrist into ulnar deviation especially with a load in the hand such as a child or even a stack of dishes.

de Quervain's syndrome was also referred to as mother's wrist due to the fact that it can be caused by over-extending the wrist into the awkward positions that parents use to hold and handle infants. It was also nicknamed washerwoman's sprain as it can be caused by wringing motions, such as wringing out a washrag or similarly, removing the lid from a jar.