Thank you for the query. I would like to know your age, whether you have any associated comorbidities like Diabetes Mellitus and also whether you are on a any Hormone replacement therapy (since you have undergone hysterectomy). Urinary Tract Infection (UTI) can arise due to a number of causes. Since you have undergone Hysterectomy, you are in a surgical post menopausal state. The vaginal area becomes dry in this situation and hence bacterial multiplication can lead to UTI. Hormone replacement therapy may have some protective effect (provided you don t have other contraindications) Diabetes mellitus (increased blood sugar) may lead to frequent UTI. Hence, it is advisable to get your blood sugar (Fasting and post prandial) checked, if you haven t got them tested yet. KUB USG may not always reveal stones, specially small ones (X-ray KUB may be more useful in this regard). I would also like to know whether the residual urinary volume (RUV) was done during your USG. Increased RUV may be a reason for recurrent UTI. I would advise you to drink plenty of fluid and maintain personal hygiene. Avoid using any type of pain-killers. If not done you can get a Urine culture done, which may reveal the organism responsible (so that you can take targeted antibiotics) and get your renal function test done. If there is any irregularity, you should contact your physician for further check up and advise. Hope this help you.