Recurrent UTIs

Burning. Urgency. That heavy, dragging ache low down. Another out-of-hours appointment, another three days of trimethoprim, and six weeks later you're back. Menopause-related tissue changes can contribute, but symptoms and cultures matter too. Acute infection treatment and longer-term prevention are separate conversations.

Recurrence after 40 is rarely about hygiene, and it's almost never about you doing something wrong.

The vaginal microbiome loses its bouncer. Lactobacilli depend on estrogen-fed glycogen in the vaginal wall. As estrogen drops they die back, pH climbs from about 4 to above 5, and gut bacteria that used to be outcompeted at the vaginal opening now colonize freely. From there it's a short trip up a short urethra.

The urethra and bladder neck thin out too. That's the 'urinary' half of genitourinary syndrome of menopause. Thinner tissue is easier to irritate, easier to colonize, and less able to flush itself. It's why urgency and frequency often travel with the infections, and why they can linger after the infection clears.

Incomplete emptying. Prolapse, a tight or overworked pelvic floor, or simply rushing means a residue of urine stays behind. Bacteria that would have been flushed out get hours to multiply instead. A pelvic floor physio is often more useful here than another prescription.

Repeated antibiotics reshape what's left. Each course clears the infection and also thins the protective flora, which is part of why the gap between infections tends to shorten. It's a loop, not bad luck, and it's the reason prevention beats treatment here.

Sometimes it isn't an infection at all. Burning, urgency and pressure with repeatedly negative cultures can be atrophy, interstitial cystitis or pelvic floor dysfunction wearing a UTI costume. Being told 'nothing grew' is information, not dismissal, and it changes the treatment completely.

The first item on this list is the one that does most of the work. Everything else is support.

Vaginal estrogen, and give it three months. Local vaginal estrogen can reduce recurrence in menopause-related care. It isn't systemic MHT or a treatment for an acute infection. Ask which preparation fits your history, how to use it and when to review benefit; follow your prescription rather than one dosing schedule for everyone.

If you've had breast cancer, still ask. Vaginal estrogen is appropriate for many people with a breast cancer history, with their oncologist in the loop, and the major menopause and oncology bodies say so. If you're on an aromatase inhibitor the conversation is more nuanced, and it's still a conversation worth having rather than assuming the answer is no.

Ask for a culture before the next antibiotic. For recurrent localized uncomplicated cystitis, ask how to arrange urinalysis and culture with sensitivity testing for each symptomatic episode before treatment. Don't delay urgent care to obtain a sample. Previous results and treatment dates can help plan the next step.

Methenamine hippurate as an antibiotic alternative. It makes urine hostile to bacteria rather than killing them, so it doesn't drive resistance. In the ALTAR trial it was non-inferior to daily low-dose antibiotics for prevention. Ask about it by name if you're being offered another six months of prophylactic antibiotics.

D-mannose and cranberry: modest, not magic. Cranberry has small preventive benefit in some trials. D-mannose looked promising, then the larger 2024 primary-care trial found no benefit. Neither is harmful, neither replaces vaginal estrogen, and neither deserves the price some brands charge.

Hydration, full emptying, and peeing after sex. Drinking an extra 1.5 L a day halved recurrences in one randomized trial, which is a bigger effect than most supplements manage. Take your time on the toilet, let the bladder finish, and empty after sex. Old advice, genuinely evidence-backed.

A pelvic floor physio if emptying is the issue. If you also have leaks, prolapse, a slow stream or a sense of never quite finishing, the floor is part of the story. This is the referral that gets missed.