Intro
Benign prostatic hyperplasia (BPH) is a non-cancerous enlargement of the prostate gland that is extremely common with advancing age. By age 60, more than half of men have some degree of BPH; by age 85, the figure approaches 90%. The enlarged prostate presses on the urethra, causing a range of lower urinary tract symptoms (LUTS) that can significantly affect quality of life.
BPH is not prostate cancer, does not cause cancer, and is treatable. The right management approach depends on symptom severity, individual health, and personal preference.
Key Points
- BPH affects the majority of men over 60 and is the most common cause of lower urinary tract symptoms in men
- Symptoms include weak urine stream, frequency, urgency, nocturia, incomplete bladder emptying, and hesitancy
- Diagnosis is clinical — history, symptom score, urinalysis, and PSA testing to exclude prostate cancer
- First-line treatment for mild symptoms is lifestyle modification
- Medications (alpha-blockers, 5-alpha reductase inhibitors) are effective for moderate to severe symptoms
- Surgery — including TURP — is reserved for significant symptoms or complications
- BPH and prostate cancer can coexist; evaluation should exclude cancer where indicated
Background
The prostate gland surrounds the urethra at the base of the bladder. In BPH, overgrowth of prostate tissue — driven by hormonal changes as testosterone declines and dihydrotestosterone (DHT) remains influential — causes the gland to press on the urethra. This creates the characteristic “obstructive” symptoms of BPH.
The severity of symptoms does not always correlate with prostate size. Some men with significantly enlarged prostates have mild symptoms; others with modestly enlarged prostates experience substantial bother.
Symptoms
BPH produces two overlapping categories of lower urinary tract symptoms:
Obstructive (voiding) symptoms
- Weak or slow urine stream — reduced force due to urethral narrowing
- Hesitancy — difficulty initiating urination
- Straining — having to push to start or maintain flow
- Incomplete emptying — sensation that the bladder has not fully emptied
- Dribbling after urination ends
Storage (irritative) symptoms
- Frequency — needing to urinate more often than usual
- Urgency — sudden, strong urge to urinate
- Nocturia — waking one or more times per night to urinate
Symptom assessment
Doctors commonly use the International Prostate Symptom Score (IPSS) — a validated questionnaire scoring severity from 0 to 35. Scores guide treatment:
- 0–7: Mild — watchful waiting appropriate
- 8–19: Moderate — medication often recommended
- 20–35: Severe — medication or procedural intervention usually indicated
Red Flags Requiring Prompt Evaluation
Seek medical assessment promptly if you notice:
- Complete inability to urinate (acute urinary retention) — a medical emergency
- Blood in the urine (haematuria)
- Recurrent urinary tract infections
- Kidney function concerns on blood tests
- Significant unexplained weight loss or bone pain (possible malignancy)
- Rapidly worsening symptoms
Diagnosis
Clinical history
A doctor will review symptom duration, severity, fluid intake patterns, medications (diuretics, antihistamines, and decongestants can worsen symptoms), and other health conditions.
Physical examination
A digital rectal examination (DRE) estimates prostate size and assesses for nodules or firmness that might suggest cancer.
PSA (Prostate-Specific Antigen) testing
PSA is produced by the prostate and can be elevated in BPH, prostatitis, or prostate cancer. A mildly elevated PSA in the setting of BPH is common, but significant elevation warrants further investigation. PSA testing involves a shared decision with the patient, weighing benefits and potential harms of further workup.
Urinalysis
To exclude infection, blood, or glucose abnormalities.
Bladder diary and flow rate
Frequency-volume charts and uroflowmetry (measuring urine flow speed) can quantify symptoms and response to treatment.
Further tests (if indicated)
- Post-void residual urine measurement (ultrasound)
- Prostate size measurement (transrectal or abdominal ultrasound)
- Referral to urology for urodynamic studies when diagnosis is uncertain
Differentiating BPH from Prostate Cancer
Both BPH and prostate cancer can cause similar urinary symptoms and elevated PSA. Key distinctions:
| Feature | BPH | Prostate Cancer |
|---|---|---|
| Age of onset | Typically 50s–60s+ | Typically 60s+ |
| PSA | Can be elevated | Often elevated |
| DRE findings | Smooth enlargement | Firm, irregular nodule possible |
| Symptoms | Obstructive / storage | Can be similar or asymptomatic |
| Urgency/nature | Benign; progressive | Risk of spread if untreated |
If prostate cancer is suspected — based on PSA level, rate of rise, DRE findings, or clinical risk — further investigation with MRI and possible biopsy is appropriate.
Treatment
1. Watchful waiting and lifestyle changes
For mild symptoms (IPSS ≤ 7) or if symptoms are not significantly bothersome:
- Fluid management: reduce overall intake, limit caffeine and alcohol which increase urinary urgency
- Timing: avoid large fluid intake in the 2 hours before bed to reduce nocturia
- Double voiding: urinating, waiting a few minutes, then urinating again to improve bladder emptying
- Pelvic floor awareness: relevant in some cases, discuss with your doctor
- Review medications: some blood pressure medications, antihistamines, and decongestants worsen symptoms
2. Medications
Alpha-blockers (first-line for moderate to severe symptoms)
Alpha-blockers relax smooth muscle in the prostate and bladder neck, improving urine flow. They work quickly — often within days.
Common agents: tamsulosin, alfuzosin, silodosin, doxazosin
Side effects: dizziness, light-headedness (postural hypotension), retrograde ejaculation (with tamsulosin and silodosin).
5-alpha reductase inhibitors (5-ARIs)
These reduce prostate size by blocking conversion of testosterone to DHT. They work more slowly (3–6 months) but can reduce prostate volume by 20–30%.
Common agents: finasteride, dutasteride
Side effects: reduced libido, erectile dysfunction, decreased ejaculate volume; rarely, gynaecomastia.
Combination therapy (alpha-blocker + 5-ARI) provides greater symptom relief and slows disease progression in men with larger prostates.
Phosphodiesterase-5 (PDE5) inhibitors
Tadalafil (used for erectile dysfunction) is also approved for BPH-related LUTS. Useful when both BPH and erectile dysfunction are present.
3. Minimally invasive procedures
When medications are insufficient or not tolerated, minimally invasive options include:
- Prostatic urethral lift (UroLift): implants hold prostate lobes apart — no tissue removal, faster recovery, low risk to sexual function
- Rezūm (steam therapy): water vapour destroys excess prostate tissue; day procedure with gradual improvement
- Transurethral microwave therapy (TUMT): microwave energy reduces prostate size
- Aquablation: robotic water jet ablation, useful for larger or irregular glands
4. Surgery
Considered for significant symptoms, large prostate size, or complications:
- TURP (Transurethral Resection of the Prostate): the established standard. Resects excess prostate tissue via a scope inserted into the urethra. Excellent long-term results. Requires anaesthesia and hospital admission. Side effects include retrograde ejaculation in most cases.
- Holmium Laser Enucleation of the Prostate (HoLEP): increasingly used for large prostates; comparable outcomes to TURP with less bleeding risk.
- Open/robotic prostatectomy: reserved for very large prostates or complex cases.
Nocturia and Sleep
Nocturia — waking to urinate at night — can have multiple contributing causes beyond BPH. Before attributing nocturia solely to BPH, consider discussing:
- Sleep disorders including sleep apnoea, which alters bladder function overnight
- Nocturnal polyuria — overproduction of urine at night, sometimes related to heart or kidney conditions
- Evening fluid and caffeine habits
Treating nocturia often requires a multi-pronged approach. See Sleep and Health for broader context.
Long-term Outlook
Most men with BPH have a good prognosis. The condition progresses slowly, and treatment — from lifestyle changes to medication to surgery — is effective at managing symptoms. Complications (acute retention, bladder stones, kidney damage) are uncommon when BPH is identified and managed early.
Regular monitoring is appropriate to detect symptom progression or rising PSA.
Further Reading
- Urology Care Foundation — BPH
- NICE — Lower Urinary Tract Symptoms in Men
- EAU Guidelines on BPH / Male LUTS