I had burning and pain during micturition, frequent urge to urinate and dysuria a week before after an attempt of sexual intercourse. I hydrated myself well and had reduced symptoms in four to five days. But after a week, before last two, all in a sudden I developed pain on my lower back just like flank pain. I got a doubt whether I developed renal calculi, cystitis or pyelonephritis following an untreated uti. Because I did not had any exposure to excessive work or lifting heavy weights or anything as such. I started on nitrofurantoin thinking I should treat my uti, then upgraded to cefixime as advised by a friend. I got my hemogram, renal fx test, urine routine examination done. All the reports were normal. I am continuing on cefixime 200 mg bd and syp alkasol 10 ml tds. But still I have severe aching pain on my back. In between I have got bloating of abdomen too. I got my usg kub and abdomen done. It was a normal scan. There was nothing significant. I am still suffering from dull aching pain on my back radiating to my both hips. Radiologist said if I have pain on my both sides of vertebra simultaneously it is less likely due to any issue with kidneys. If so, can you please tell me what can be the issue?