What is a UTI?
A urinary tract infection occurs when bacteria colonize the urinary tract, most often the bladder (cystitis). Symptoms typically include burning with urination, urinary urgency and frequency, pelvic pressure, and cloudy or foul-smelling urine. UTIs are considered recurrent when a person experiences two or more infections in six months, or three or more in a year.
Risk factors
- Sexual activity and use of spermicides
- Postmenopausal changes in vaginal and urethral tissue
- Incomplete bladder emptying or pelvic floor dysfunction
- Certain contraceptives, catheters, and instrumentation
- Genetic predisposition and family history
When antibiotics are appropriate
Antibiotics remain the cornerstone of treating acute, symptomatic UTIs. Selection, dose, and duration depend on symptoms, local resistance patterns, prior cultures, and pregnancy status. For carefully selected patients with frequent recurrences, clinicians may consider short-course, post-coital, or self-start regimens. Antibiotic stewardship — using the right drug at the right time — protects long-term efficacy and the urinary microbiome.
Lifestyle prevention
Hydration
Adequate daily fluid intake dilutes urine and increases voiding frequency, which can lower recurrence risk in many patients. Water is preferred; individualize goals if you have heart, kidney, or bladder conditions.
Voiding habits
Avoid deferring urination when the urge arises. Void after intercourse when applicable, and take time to fully empty the bladder.
Vaginal health
For postmenopausal women, local (vaginal) estrogen therapy — when appropriate and prescribed by a clinician — can restore urogenital tissue and reduce UTI recurrence. Discuss risks and benefits with your provider.
Adjunctive supplements that have been studied
Evidence varies and recommendations should be individualized. Options that have been studied for UTI prevention include:
- Cranberry (proanthocyanidin-standardized) products — may reduce recurrence in some populations.
- D-mannose — a simple sugar studied for prevention, with promising but heterogeneous data.
- Probiotics (particularly certain Lactobacillus strains) — may support vaginal and urogenital microbiome balance.
- Vitamin D when insufficient — general immune support.
These are not substitutes for medical evaluation. Persistent, severe, or febrile symptoms — particularly flank pain, fever, or blood in the urine — warrant prompt clinical assessment.