Hello, a bladder infection is likely. You can confirm it with a urinalysis and perhaps also urine culture. If the infection is confirmed, you should have to do radiological tests for the urinary tract (starting from an ultrasound scan) to exclude various conditions like obstruction by renal stones, tumors, etc Antibiotic treatment is usually started even before the test results are available. The choice of antibiotic should be based on the patient s history and recent antibiotic exposure. Taking some phenazopyridine for a couple of days might help with the discomfort. I hope you find my comments helpful! You can contact me again, if you d like any clarification or further information. Kind Regards!