Recurrent urinary tract infections
Recurrent urinary tract infections are one of the most frustrating problems I treat, partly because they are so disruptive and partly because they are so often mismanaged. A clear diagnosis and a preventive plan can usually break the cycle.
What counts as recurrent
Recurrent UTIs are defined as two or more culture-proven infections in six months, or three or more in a year.
The phrase “culture-proven” matters. When women are referred to me for recurrent UTIs, only about a third turn out to have infections confirmed by urine culture. The rest have symptoms that overlap with a UTI, such as burning, urgency, and frequency, but are driven by something else, like genitourinary syndrome of menopause, overactive bladder, or bladder pain. Treating those with repeated antibiotics does not help and can cause harm.
So the first thing I do is confirm what is going on with urine cultures, rather than treating on symptoms alone.
Why they happen
In women who have not gone through menopause, recurrent UTIs are usually related to sexual activity and to individual biological susceptibility. It is not a sign of poor hygiene.
After menopause, the picture changes. As estrogen falls, the vaginal and urethral tissues thin and the protective vaginal bacteria shift, both of which make infection more likely. This overlap with genitourinary syndrome of menopause is why local estrogen is such an effective preventive treatment in older women.
How I evaluate it
The workup is usually straightforward:
- Urine cultures to confirm that the symptomatic episodes are truly infections
- A review of your history, symptom pattern, and any prior antibiotics
- A pelvic exam, especially to look for signs of low estrogen after menopause
Extensive imaging and invasive testing rarely change the plan for otherwise healthy women, so I reserve them for specific situations rather than ordering them routinely.
Treatment and prevention
The goal is to treat real infections effectively while preventing the next one, and to avoid unnecessary antibiotics along the way.
- Treating an active infection: a short, targeted course of antibiotics, chosen based on local resistance patterns and your culture results. First-line options include nitrofurantoin, trimethoprim-sulfamethoxazole, and fosfomycin.
- Vaginal estrogen: for postmenopausal women, local vaginal estrogen lowers the risk of future infections and is my first choice for prevention.
- Cranberry: cranberry products have a modest preventive benefit and are reasonable for women who want to try them.
- Methenamine hippurate: a non-antibiotic option that can reduce infections for some women.
- D-mannose: often recommended and low risk, but the data for UTI prevention is weak.
- Preventive antibiotics: low-dose antibiotics taken continuously or after sex can work, but because of resistance and side effects I turn to them after the options above rather than first.
- What I do not treat: bacteria in the urine without symptoms (asymptomatic bacteriuria) should not be treated in most women.
When to see me
Consider an appointment if you have:
- Two or more UTIs in six months, or three or more in a year
- Repeated courses of antibiotics without a lasting solution
- UTI-like symptoms that keep coming back despite negative cultures
- Recurrent infections after menopause
Learn about vaginal estrogen for recurrent UTIs
References
- Anger J, Lee U, Ackerman AL, et al. Recurrent uncomplicated urinary tract infections in women: AUA/CUA/SUFU guideline (2019, confirmed 2022, amended 2025). American Urological Association / Canadian Urological Association / SUFU. 2019.
- Ferrante KL, Wasenda EJ, Jung CE, et al. Vaginal estrogen for the prevention of recurrent urinary tract infection in postmenopausal women: a randomized clinical trial. Female Pelvic Medicine & Reconstructive Surgery. 2021. doi:10.1097/SPV.0000000000000749
- Dieter, et al. Baseline characteristics, evaluation, and management of women with complaints of recurrent urinary tract infections. Female Pelvic Medicine & Reconstructive Surgery. 2021. doi:10.1097/SPV.0000000000001065
- Kaufman MR, Ackerman AL, Amin KA, et al. Genitourinary syndrome of menopause: AUA/SUFU/AUGS guideline. American Urological Association. 2025.