hi Dr., my mom gets regular uti and has knee pain and has mild fewer too, she used to take zinnat and lately she has been hving itching problems because of it. her pus cells-1-2/hpf, her RBC 35-40/hpf n epithelial cells 8-10/hpf, blood +++,no nitrites, no sugar n bacteria + and culture test was clean, pl advice medication