Hello.,
History noted, its good that you have passed one stone.
Kidney stone can cause urinary infection and in turn
fever if that stone has caused obstruction to your urinary pathway.Since the
sonography report does not show any obstruction, your urinary infection and kidney stones are co-incidental. Kindly consume a minimum of 3 litres a day regularly to wash out your stones as well as infection. Also take antibiotics as adviced by your physician.
Good day.