Recurrent UTI Clinic · London
Recurrent Urinary Tract
Infection Specialist, London
Thorough specialist investigation and evidence-based management of recurrent UTIs in men and women — identifying and treating underlying causes rather than just managing episodes.
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QualificationMA Cantab · MB BChir · FRCS Urol
LocationsWimbledon · Cheam · Marylebone
ReferralsGP referral or self-referral accepted
InsuranceAll major insurers · Self-pay welcome
Important: Recurrent UTIs are not something patients should simply accept as inevitable. While they are common, repeated infections can signal an underlying structural or functional cause that, once identified, can be effectively treated. Repeated antibiotic courses without investigation are not the answer — and carry risks of antibiotic resistance. A specialist assessment changes the approach from reactive to definitive.
What counts as recurrent UTIs?
Clinical definition
Recurrent urinary tract infections are defined as two or more culture-proven infections within six months, or three or more within twelve months. Both thresholds warrant specialist urological investigation to exclude an underlying cause.
UTIs are among the most common bacterial infections, affecting women far more frequently than men — but when they recur in either sex, a thorough assessment is warranted. In men, any UTI is considered complex and should prompt specialist review, as anatomical or structural causes are more likely.
Common symptoms of a UTI include burning or pain when passing urine, urinary frequency and urgency, cloudy or foul-smelling urine, and pelvic or lower abdominal discomfort. Fever, loin pain, and systemic upset suggest upper tract involvement (pyelonephritis) and require prompt treatment.
Why do UTIs recur? Possible causes
Recurrent infection without investigation leaves the underlying cause untreated. Common reasons include structural abnormalities that prevent complete bladder emptying, stones that harbour bacteria, anatomical factors, and post-menopausal hormonal changes.
Incomplete bladder emptying
Residual urine left in the bladder after voiding is a fertile environment for bacterial growth. Caused by BPH, bladder dysfunction, or neurological factors.
Bladder or kidney stones
Stones can harbour bacteria within their structure, making infections recur despite antibiotic treatment. Removal of the stone resolves the cycle.
Bladder abnormalities
Bladder diverticula (pouches), tumours, foreign bodies (including stents or sutures), and fistulae can all predispose to recurrent infection.
Post-menopausal changes
Declining oestrogen levels alter the urogenital microbiome and mucosal defence — one of the most common predisposing factors in older women.
Anatomical factors
Short urethra, urethral diverticulum, pelvic organ prolapse, and urinary-vaginal or urinary-bowel fistulae can all be contributing causes in women.
Urethral stricture (men)
Narrowing of the urethra causing incomplete emptying and residual urine. Any UTI in a man warrants investigation of the urinary tract.
Diabetes and immune factors
Poorly controlled diabetes, immunosuppression, and other systemic conditions increase susceptibility to infection and can drive recurrence.
No identifiable cause
In a proportion of women — particularly premenopausal — no structural cause is found. Prevention strategies are then the mainstay of management.
Investigation — the specialist assessment
A structured investigation follows NICE and EAU guidance on recurrent UTIs and is tailored to sex, age, symptom pattern, and clinical findings. The goal is to identify any underlying cause and confirm that infections are genuine (culture-proven) rather than symptomatic bladder dysfunction.
1
Detailed history and review of previous culture results
A thorough review of infection history, antibiotic use, culture and sensitivity results, voiding pattern, and relevant medical history. Distinguishing true bacterial infection from overactive bladder or interstitial cystitis — which can mimic UTI symptoms — is an important first step.
2
Urine microscopy, culture and sensitivity
Mid-stream urine (MSU) for formal culture — not dipstick alone — to confirm infection and identify the causative organism and its antibiotic sensitivities. Repeated dipstick-positive results without culture confirmation are a common reason for overtreatment and antibiotic resistance.
3
Post-void residual measurement and uroflowmetry
Ultrasound measurement of the volume of urine remaining in the bladder after voiding. Significant residual urine is an important and treatable risk factor for recurrent infection. Uroflowmetry assesses the flow rate and pattern.
4
Imaging — kidneys, bladder and upper tract
Ultrasound of the kidneys and bladder to assess for structural abnormalities, hydronephrosis, stones, bladder wall thickening, and residual urine. CT urogram or MRI is arranged where more detailed anatomical assessment is required.
5
Flexible cystoscopy
Direct camera inspection of the bladder and urethra — performed in all patients with recurrent UTIs to exclude bladder tumour, stones, diverticula, foreign bodies, or fistulae as a contributing cause. A quick, well-tolerated outpatient procedure under local or general anaesthetic. Note: if haematuria is also present, cystoscopy is urgent.
6
Blood tests
Renal function, blood glucose, and HbA1c where diabetes is suspected or known. PSA in men where relevant. Full blood count where systemic cause is being considered.
Management and treatment
Treatment is directed at any identifiable underlying cause first, combined with evidence-based prevention strategies. Management is always individualised — what works for one patient may not suit another.
Treat the underlying cause
First priority
Where a structural cause is identified — stones, BPH causing incomplete emptying, a bladder diverticulum, or a stricture — addressing this directly is the most effective intervention. Treating the cause rather than the recurrent infections breaks the cycle definitively.
Lifestyle and behavioural measures
All patients
Adequate fluid intake (1.5–2 litres daily), post-coital voiding, avoidance of bladder irritants (caffeine, carbonated drinks), and good perineal hygiene are recommended for all patients. Cranberry products — while not definitively proven — are reasonable and safe adjuncts for women with recurrent lower UTIs.
Topical vaginal oestrogen
Post-menopausal women
Low-dose topical oestrogen — applied vaginally — restores urogenital mucosal health and significantly reduces UTI recurrence in post-menopausal women. It is safe, effective, and largely without systemic side effects. It is underused and should be considered in all post-menopausal women with recurrent UTIs in the absence of contraindications.
Antibiotic prophylaxis
Selected patients · NICE-guided
Low-dose continuous prophylactic antibiotics — typically trimethoprim or nitrofurantoin taken at night — or post-coital single-dose prophylaxis are effective in reducing recurrence. They are recommended where non-antibiotic measures have failed, in line with NICE guidance. Duration is typically 6 months, with reassessment thereafter.
Non-antibiotic preventive strategies
Reducing antibiotic dependence
Methenamine hippurate (Hiprex) — a urinary antiseptic rather than a true antibiotic — is an effective and increasingly recommended alternative to antibiotic prophylaxis for selected women with recurrent UTIs. Intravesical instillations (such as hyaluronic acid or chondroitin sulphate) aim to restore the bladder's protective lining and are used in patients with refractory recurrence. D-mannose supplements may offer benefit for E. coli-associated recurrence.
Surgical management
Where indicated by investigation findings
Where cystoscopy or imaging reveals a surgically correctable cause — such as bladder stones, a diverticulum, or a fistula — appropriate surgical treatment is planned. Stone removal (cystolitholapaxy or ureteroscopy), diverticulectomy, or fistula repair as required. All performed minimally invasively where possible.
Related conditions — when to also be investigated for these
Blood in urine
Haematuria alongside recurrent infections requires urgent separate investigation
Haematuria clinic →
Urinary symptoms
Urgency, frequency, or incontinence alongside UTIs may require separate assessment
LUTS & incontinence →
Obstruction
Recurrent UTIs with upper tract dilatation may indicate PUJ or ureteric obstruction
PUJ obstruction →
Frequently asked questions
I keep getting UTIs — is there always an underlying cause?
Not always. In a significant proportion of women — particularly premenopausal women with no structural abnormalities — no single identifiable cause is found. In these cases, prevention strategies (lifestyle measures, topical oestrogen, prophylactic antibiotics, or non-antibiotic alternatives) are the mainstay of management. However, it is important to exclude a structural cause before concluding that none exists, which is why specialist investigation is warranted.
Do I really need a cystoscopy?
Yes — flexible cystoscopy is recommended in all patients with recurrent UTIs to exclude bladder pathology. It is a quick, well-tolerated procedure performed under local anaesthetic in an outpatient setting, and takes only a few minutes. Bladder tumours, stones, and diverticula can all present with recurrent infections and are reliably excluded by direct inspection.
Are frequent courses of antibiotics harmful?
Yes — repeated antibiotic courses contribute to antibiotic resistance, disrupt the gut and urogenital microbiome, and carry a risk of Clostridioides difficile infection. This is one of the most important reasons to move from reactive antibiotic treatment to a planned prevention strategy under specialist guidance.
My urine symptoms feel like a UTI but my cultures keep coming back negative — what does this mean?
Negative cultures with persistent symptoms are important. They may indicate that symptoms are due to overactive bladder, interstitial cystitis (painful bladder syndrome), or urethral irritation rather than true bacterial infection. A specialist assessment will clarify this and direct appropriate treatment, which differs significantly from antibiotic management.
Do I need a GP referral?
No — you can self-refer directly. Please bring any previous urine culture results, antibiotic history, and investigation reports to your consultation as these are very helpful in directing the assessment efficiently.
Mr Denosshan Sri
MA Cantab | MB BChir | FRCS Urol | Consultant Urological Surgeon
Mr Sri provides structured specialist assessment and management of recurrent urinary tract infections in men and women, including the full investigative pathway from urine culture review through to flexible cystoscopy and upper tract imaging. Where a surgical cause is identified, definitive treatment is arranged or appropriate subspecialty referral made. He sees patients at three private hospital locations in London and Surrey.
Clinic locations
Spire St Anthony's
801 London Road
Cheam, Surrey SM3 9DW
Tel: 020 8337 6691
Nuffield Parkside
53 Parkside
Wimbledon SW19 5NX
Tel: 020 8971 8000
HCA Princess Grace
18 Devonshire Street
Marylebone W1G 7AF
Tel: 020 379 77248
