The Finkelstein test is a physical test used by physicians to detect De Quervain’s tenosynovitis, a condition in which the tendons in the thumb and wrist become inflamed, causing pain and stiffness in the base of the thumb and/or side of the wrist closest to the thumb. The test is performed by having patients make a fist with the thumb folded inside the fist, then moving their hand downward, away from the thumb. If this motion triggers pain at the base of the thumb, the condition is indicated.