"...a bacterial infection that affects any part of the urinary tract.
When bacteria gets into the bladder or kidney and multiply in the urine, they may cause a UTI. Although they cause discomfort, urinary tract infections can usually be easily treated with a short course of antibiotics. Symptoms include frequent feeling and/or need to urinate, pain during urination, and cloudy urine." (THAT INFORMATION CAN FROM THE INTERNET).
Helpful preventions are of course good personal hygiene, drinking plenty of water,and cranberry juice (actually true).