what causes de quervain's tenosynovitis
People can get de Quervain's when they hurt or use the thumb or wrist too much. Common activities that need your wrist and thumb can cause the problem. Some activities that might cause de Quervain's are: 1  Wringing out wet clothes. 2  Hammering. 3  Skiing. 4  Knitting. 5  Lifting heavy objects such as a jug of milk, taking a frying pan off of the stove, or lifting a baby out of a crib.