It's probably because they added a whole bunch of deer to Cyrodiil. Only these deer are heading to the sewers to get shot.
Just wait for some of the deer to get frustrated and rage quit, and the lag problem should subside.
wraithguknub18_ESO wrote: »Yeah doesnt matter where I am what Im doing I cant play> I am literally getting a headache from all the stop starting stutter stepping and every time I zone I have to reset my ui size