<s>[INST] I am female 22 years old. A few months ago I was hospitalized for kidney stones and pyelonephritis. Since then I have had terrible lower back pain and recently I have had off coloured urine, dark flakes in my urine, and a low grade fever. I have a crippling fear of doctors so I only go in when I absolutely have to. Should I be concerned? [/INST] HelloThanks for query. Sever pain lower back, high grade fever off colored urine are strongly suggestive of UTI secondary to stone impacted in Ureter. Please consult qualified Urologist for clinical assessment and get following basic tests done to confirm the diagnosis 1) Urine Routine and Urine culture 2) Ultrasound Scanning of abdomen 3) Renal function tests. Neglecting to see doctor may result in permanent damage to the kidney. Further treatment will depend upon the results of these tests as regards degree of obstruction due to stone, back pressure changes in kidney and final diagnosis, Chat Doctor.  </s>