<s>[INST] hi, I had kidney stone problem which was removed through medicines previously. i had my sonugraphy done in dec 2016 which clearly states normal reports excepts crystal of calcium oxalate & past history of uti.. on march 3 again i suffered from burning sensation in urine, n chills in urine for which i had blood test done n urinalysis. blood test include rbc n creatinine whicChatDoctore as normal. in my urine bacteria & pus cells were present. its almost a month, m much better but chills or little pain in urine is very little there. chills specially. pls help [/INST] I am really sorry to hear this about your health status. But I'm here to help you out. Don't worry, it's a treatable disease. Hi and welcome to Chat Doctor. I thank you for posting your query here. I read your question completely and have understood it well. Furthermore, I being a surgeon, we encounter so many such cases day in and day out. Well, kidney stone disease is the most common urological disease. But, luckily It's very well treated and cured. Please note the following few facts, I will analyze all your concerns. 1. You had kidney stones and were treated with medicines. Yes. Small calculus which can be passed out in urine. Say, 5 to 6 mm are best treated conservatively. 2. Sonography or USG Normal.That's good, your follow-up scan was normal. But sometimes what happens is, USG won't pick up all the stones. CT scan has to be done. 3. You had UTI episode again. And your major problem is chills and fever on and off. Well, this is the most common presentation again. Please do these following things. A. Get a urine culture, routine during the episode of fever without any delay. This is very important. B.  Frequent UTI with history of stone disease points towards residual or new stones. Suggest, you to get a CT scan of PUB. Urinary system. This will help you find out the cause and treat accordingly. Hope this helps you, in case you need further assistance, please let me know. Take care and God bless you. </s>