According to the symptoms you reported (frequent urge to urinate while lower side/back aches are present, feeling of bladder not emptied completely after urination), it seems possible that you might be experiencing a urinary tract infection. Urinary tract infections might affect any part of the urinary tract, most frequently the urinary bladder or the kidneys.


The regular urine flow decreases the chances for bacteria to multiply. When the urine flow is reversed or insufficient for different reasons, a good environment for multiplying bacteria is created. The urine flow might be insufficient because of strictures in the urinary tract (in prostate hypertrophy or cancer, for example). One of the possible causes for reverse urine flow might be kidney reflux where the urine returns to the kidneys because of insufficient valves located where the ureters enter the urinary bladder.


You might want to visit nephrologists or a urologist for an ultrasound scan of the kidneys and/or voiding cystourethrogram (VCUG) which is a method in which an x-ray examines the urine flow when liquid dye is inserted in the urethra.


As for the urine infection, you might want to have a urine culture in order to detect the exact bacteria and the most effective antibiotic. Please keep in mind that repetitive urinary infections might be caused by bacteria that are already resistant to various antibiotics and the urine culture with antibiogram is needed to avoid taking ineffective antibiotics.