Hi i am Dr Ahmed Aly thanks for using healthcaremagic site , I had gone through your question and understand your concerns .. In my opinion sprained wrists can cause tenosynovitis with stiffness it may take up to 2 to 3 weeks if it had no fissures or fractures . if swelling persists for more than 2 weeks i suggest Xrays and MRI to exclude bone injuries . For now stay massaging it , wear wrist supports or an arm sling , avoid heavy lifting and vigorous movements will help . if not visit your physician . Please click THANK YOU and consider a 5 star rating with some positive feedback if the information was helpful. Hope the above information helps you, Any further clarifications feel free to ask.