I have been diagnosed with de Quervain's Tenosynovitis and had a cortisone injection into my left wrist just above my thumb in May, so it's been almost two months ago. I was instructed to wear a splint for a few days after the injection. It doesn't seem to have been effective as I still have pain, an sometimes stinging, in my wrist and cannot comfortably bend it either from side to side or forward and back, and there is pain in the base of my thumb when I try to flex it. Even picking up my coffee cup causes pain and there appears to be slight swelling. The doctor said the cortisone will continue to work, but it doesn't seem to be doing anything. What's next?