Etiology of Urinary Frequency There are many causes of urinary frequency (see table Some Causes of Urinary Frequency), but the most common include Urinary tract infections (UTIs) Urinary incontinence Benign prostatic hyperplasia (BPH) Urinary tract calculi Table Evaluation of Urinary Frequency History History of present illness should first ask about the amounts of fluid consumed and voided to distinguish between urinary frequency and polyuria.