<s>[INST] Hi I had recently lithotripsy with laser for blastic 9 mm stone in urator tube and eswl for 5 mm stone blasting and both these are for left kidney. Currently I am with stent which was placed on 14th of this month. Since last two days I am getting chilling feeling and shivering for about 15 mnts  and then it disappears. initially it is started with total body pain and then since yesterday fever is about 101 [/INST] HelloThanks for query. You had undergone endoscopic surgery of URS for fragmentation of stone in your left ureter and ESL for 5 mm stone in left kidney. The pain, fever and chills that you have is due to following factors .1) There are bacteria in the center of the stone (Sides) which get liberated after fragmenting stone. These bacteria enter in to general blood circulation and cause fever and chills 2) There is an allergic reaction of the mucus membrane of Ureter(Urethritis) to the foreign body (Stent) that gives rise to pain and fever. These are known and common events after URS and DJ stenting. Following measures will help to resolve the issue 1) Chat Doctor. This will get resolved after removing the stent. </s>