A friend injured a tendon in his leg so my wife asked if I had given him a form of treatment.I called him and told what to do.When I was in PT for injuries & after corrective surgery the PT's went to their freezer & brought out 6 oz paper cups solid with ice.I tore off some of the lip & was instructed to rub my sore knee with ice, it would get cold, then burn & keep doing it until it was numb to take away the inflamation,it worked as I repeated the proceedure at home after exercising removed the joint pain making walking tolerable.I've done this with sprains & sore knees & will continue this treatment.

My first aid class way back when said rest, immobilize, chill and elevate.