For some people, it can be a one-time occurrence that resolves with UTI treatments. For others, UTIs can recur and become more challenging to manage and treat. Recurrent UTIs do not have a single cause. Still, certain factors increase the risk of infection and re-infection, such as sexual activity, condom use, hormonal deficiency, diabetes, kidney stones, incontinence or a weakened pelvic floor, and underlying urinary tract abnormalities.