According to the National Kidney and Urologic Diseases Information Clearinghouse (NKUDIC), UTIs are the second most common type of infection in the body. Almost 50 percent of women get a UTI at some point in their life. Therefore, it is essential that teens understand the symptoms of a UTI and what to do if they think they have one. UTIs are common and relatively harmless, but they can become serious if left untreated. This helpful guide covers the signs and symptoms, treatment, and prevention of UTIs, as well as how to cope with one at home and school.