Respected user, hi I evaluated your query in detail.
*Side effects of UTI include
Cystitis, burning micturition, pain lower
abdomen, fever, malaise, loss of appetite,development of bladder
calculi,urethral strictures ,genital infections, ascending infection involving
kidneys causing
Pyonephrosis ,
Septicemia ,
Renal failure in advanced
cases .
*Rash mentioned here is separate entity not related with UTI .
*I would recommend
Ultrasound abdomen & pelvis for cause of lower back
pain from ureteric calculus.
Hope this clears your query .
Thanks for using Health care magic & keeping trust in our medical services.
Wishing your daughter fast and speedy recovery from the same.
Regards dear take care of her.