I have been gone all day and came home to what looks like tail rot. my sav has on the end of her tail a small section that looks black and feels very stiff. not to be too gross but it smells like something died. can tail rot come about this quickly, i know it was not there yesterday? and how is it treated? do i need to make an emergency vet appt or will it work itself out? i have never had any of my lizards get this so i really am not sure about it. any help or info would be much appreciated

