What is the best treatment for hand stress injuries?

Change activities. We really need more info to be more helpful. What kind of injuries? What is your job activities?
Wrapping. Use capsaicin patch if this is a old stress, Lidocaine patch if this a recent stress and wrap with unna ooot strips (calamine soaked gauze) cover with webril and tubular stretch bandage - for swelling we use grey foam on top with acewrap to give extra comfort and pressure - this is called complex decongestive therapy will be performed by people trained in this contact you local physical therapist.