Enlarged Prostate (BPH)
Conditions · Enlarged prostate (BPH)
Enlarged prostate (BPH): symptoms, causes, treatment, and the prostatitis connection most men are never told about
Benign prostatic hyperplasia (BPH) is the label for a prostate that has grown large enough to squeeze the urethra and change the way a man urinates. Textbooks call it a normal part of ageing driven by hormones. After decades of examining and treating prostates of every size, our view is different: in the large majority of men the gland grows because it has been quietly inflamed for years, and when that inflammation is treated the gland shrinks. This page gives you the standard picture, our position, the research that now points in the same direction, and the measured results of our own patients.
Enlarged prostate at a glance
What an enlarged prostate is
The mechanics
The prostate sits just below the bladder and wraps around the first part of the urethra, the channel that carries urine out. When the tissue around that channel grows, it narrows the passage. The bladder has to push harder to empty, and over the years its muscle thickens, then weakens, and finally stops emptying completely. Urine is left behind, the bladder becomes irritable, and infections, stones and pressure on the kidneys can follow.
The standard explanation is that the growth is driven by the male hormones acting on an ageing gland. Hormones certainly play a part. But they do not explain why one 60-year-old has a 20 ml prostate and his neighbour an 80 ml one, why so many men in their thirties and forties already have “enlarged” glands, or why a gland can shrink by a third when its inflammation is treated. Our explanation is in the section below.
Size explains the urination, not the rest
How badly a man urinates depends less on the volume of the gland than on how much it deforms the urethra. A modest, hard, fibrous prostate or a middle lobe bulging into the bladder can obstruct badly, while a large soft gland may cause little trouble. That is why a routine ultrasound that reports a “moderately enlarged prostate” says very little on its own: the flow rate, the residual urine and the state of the bladder wall say much more.
What is happening underneath matters more
A prostate does not simply get bigger. Inside it, years of inflammation leave scar tissue (fibrosis), blocked ducts, calcifications and strangled blood vessels and nerves. That is what produces the pain, the sexual symptoms and the semen changes that a “BPH” diagnosis never explains, and it is why we look inside the gland with transrectal ultrasound rather than stopping at its size. Read how chronic prostatitis damages the prostate.
Symptoms of an enlarged prostate
Leaving the symptoms of chronic prostatitis aside for a moment, these are the classic urinary symptoms of an obstructing prostate. They creep up gradually, which is exactly why men adapt to them and come late.
Weak or interrupted stream
The stream loses force, stops and starts, and takes longer. Men often notice it when standing next to someone younger.
Hesitancy and straining
A wait of several seconds before urine comes, and a need to push with the abdomen to keep it going or to finish.
Dribbling after finishing
A few drops after you think you are done, because the urethra behind the obstruction does not empty.
Frequency and urgency
Going more than four or five times a day, and sudden strong urges that cannot wait. The bladder is irritable because it never empties. See frequent urination in men.
Nocturia
Getting up at night once, then twice, then more. One of the earliest and most under-reported symptoms.
Incomplete emptying
The feeling that urine is left behind, and later the reality of it: residual urine measured on ultrasound.
Later come blood in the urine (often dark, cognac-coloured rather than red), recurrent urinary infections, bladder stones and, eventually, a fall in kidney function. Diabetes, heart disease and high blood pressure make all of it worse.
Most men are told that BPH begins after 50 and gets going after 65. In our clinic we see the same disease decades earlier. The story is usually the same: irritative symptoms first (burning, frequency, a heaviness after sitting, a change in the semen), dismissed for years as “a bit of prostatitis” or “stress”. Then, as the side lobes of the gland enlarge, the obstructive symptoms take over and the diagnosis quietly changes to “BPH”. Nothing changed except the size of the gland. The inflammation was there the whole time.
Enlarged prostate with pain, burning, tingling or erection problems? That is not BPH
Thousands of men search every month for “enlarged prostate and testicle pain”, “enlarged prostate leg pain”, “enlarged prostate burning” or “can an enlarged prostate cause erectile dysfunction”. The honest answer is that a simply enlarged gland does none of these things. An inflamed gland does all of them.
Pain in the testicles, groin, perineum, lower back or legs
The prostate shares nerves with the testicles, the inner thighs and the lower back. When it is inflamed, these areas ache, burn or tingle, often on one side, often worse after sitting or after ejaculation. Size alone does not hurt. Read about testicular pain and the full range of prostatitis symptoms.
Burning, urethral tingling, “infections” that come back
Burning in the urethra, a feeling of tingling or a foreign body, discharge or episodes that antibiotics improve and never cure are signs of infection and inflammation of the prostatic ducts, not of a large gland.
Weaker erections, premature ejaculation, semen changes
Chronic prostatitis is one of the most common and most overlooked causes of erectile dysfunction in men under 60, through the nerves and vessels that pass through the gland and through the seminal vesicles. A “BPH” diagnosis explains none of this. Read how prostatitis causes erectile dysfunction.
If your “enlarged prostate” comes with any of the above, you have not been given the whole diagnosis. The inflammation is the disease; the enlargement is one of its consequences.
Why the prostate grows: our position
Our hypothesis, built on decades of transrectal ultrasound, microbiology and treatment results, is that the main driver of prostate enlargement is microbial, not hormonal. Microbes reach the prostatic ducts, settle in the gland, and keep it in a state of low-grade inflammation for years. That inflammation makes the glandular and supporting tissue multiply and scar. Hormones are the secondary factor: they set the pace, but the inflammation lights the fire.
We do not believe “simple BPH” exists on its own
In our view, benign prostatic hyperplasia is a late complication of chronic prostatitis. The inflammation that started with irritative symptoms years earlier has, by then, enlarged the side lobes of the gland, and the symptoms now come from the volume rather than from the original cause. That is why we treat the two as one disease at different stages, and why we look for inflammation in every “enlarged” prostate, whatever the man’s age.
Small prostates can be inflamed too
The opposite mistake is just as common. Many young men with a 12 to 20 ml prostate are told their gland is “normal” because it is not large, and their symptoms are put down to stress or a “pelvic floor” problem. In these men the symptoms come from the internal changes of the tissue, not from its size: blocked ducts, fibrosis, calcifications, inflamed seminal vesicles. Size alone never rules prostatitis in or out. Read about what inflammation does inside the gland and prostate calcifications.
What the research shows: chronic prostatitis and BPH are connected
For years our position was a clinical observation. Independent research now points in the same direction: inflammation is found in most enlarged prostates, men with a history of prostatitis develop BPH far more often, inflamed glands are larger and obstruct more, and live bacteria have been grown from the tissue of “benign” enlarged prostates.
Men with prostatitis develop BPH far more often
In the Health Professionals Follow-up Study, one of the largest long-term studies of men’s health in the United States, men with BPH were almost eight times more likely to report a previous diagnosis of prostatitis than men without it. A pooled analysis of published studies by Krieger and colleagues reached the same conclusion: a history of prostatitis symptoms carries a substantially increased risk of BPH and urinary symptoms later in life.
Inflammation is the rule inside enlarged prostates
In the REDUCE study of 8,224 men, the degree of chronic inflammation seen under the microscope independently predicted how bad the urinary symptoms were. In series of prostates removed at surgery for BPH, chronic inflammation was present in the large majority of specimens.
Inflamed glands are bigger and obstruct more
In a Japanese study of 179 men operated on for BPH, those whose glands showed predominant inflammation had significantly larger prostates (about 64 ml versus 54 ml), weaker flow and more episodes of urinary retention than those with little inflammation.
Live bacteria in “benign” enlarged prostates
In a 2020 study of 36 prostates removed for BPH, live bacteria were cultured from 20 of them, more than half: Staphylococcus, E. coli and Micrococcus among others. E. coli taken from these glands switched on the inflammatory signal NF-κB and caused DNA damage in prostate cells in the laboratory. A 2025 study in Nature Microbiology showed how E. coli attaches to a receptor on prostate cells and invades them.
The mechanism is well described
Persistent infection keeps immune cells in the tissue. They release signalling molecules such as IL-6, IL-8, IL-17, TNF-α and TGF-β that tell the glandular and supporting cells to multiply and to lay down scar tissue. The same molecules are found at high levels in BPH tissue. The pattern is familiar from other organs: Helicobacter pylori and the stomach, chronic hepatitis and the liver. Long-standing infection remodels the organ.
Even standard BPH drugs work partly on inflammation
5-alpha-reductase inhibitors, the drugs that shrink the prostate, have been shown to reduce the inflammatory infiltrates inside it. Obesity and a larger waist, both pro-inflammatory states, go with more severe prostate inflammation. None of this fits a purely hormonal story; all of it fits an inflammatory one.
To be precise: the published research establishes a strong and consistent association between chronic prostatitis, especially bacterial infection, and BPH, and describes a plausible mechanism. It has not yet proved cause and effect with long-term trials, and some researchers argue the arrow can also point the other way, with a stagnant enlarged gland becoming infected. We think both happen, and that in the large majority of men the inflammation comes first. What we can show for ourselves is the part that matters most to a patient: when the inflammation is treated, the gland shrinks.
Sources: Krieger et al., pooled analysis of prostatitis and BPH/LUTS, 2008; Collins et al., Health Professionals Follow-up Study, J Urol 2002; Nickel et al., REDUCE trial, Eur Urol 2008; Inamura et al., 2018; Robert et al., Prostate 2009; Jain et al., 2020 (bacterial cultures from TURP tissue); Fowke et al., 2016; Nature Microbiology 2025 (E. coli FimH and prostate cells).
Our results: the enlarged prostate shrinks when the inflammation is treated
We measure prostate volume by transrectal ultrasound at the start of treatment and at intervals during it. Below are the results of the men who came to us with an already enlarged gland (30 ml or more) and completed a course of treatment.
And the result holds after treatment stops
Shrinkage during treatment could be dismissed as temporary. So we looked at the men who paused treatment and came back on average 1.8 years later (up to 4.2 years) without any treatment in between. Their prostates had shrunk by 39% at the end of their treatment block and were still 32% smaller than at the start when they returned. In 25 of 26 men the gland was still clearly smaller. Read the full analysis in what we count as success, and do patients relapse.
Hormonal enlargement does not behave like this. Inflammatory enlargement does: remove the cause and the oedema subsides, the ducts drain and the gland deflates. A healthy prostate measures under 20 ml. By the end of treatment, many of our younger patients have a prostate of 8 to 15 ml, and that is what a healthy prostate looks like to us.
Enlarged prostate or chronic prostatitis? Two stages of the same problem
Every week we see men in their thirties and forties who have been told for years that they have “BPH” or “an enlarged prostate”, put on alpha-blockers, and never examined further. Their prostate is indeed enlarged, but it is enlarged because it is chronically inflamed, and drugs that relax the urethra do nothing about that. Enlargement in a man under 55 is prostatitis until proven otherwise, and in our experience it usually is in older men too.
Early stage: the inflammation dominates
- Any age from the late teens onwards, often 25 to 50
- Pain or heaviness in the perineum, groin, testicles, lower back or legs
- Burning in the urethra; “infections” that antibiotics improve but never cure
- Sexual symptoms: weaker erections, premature or painful ejaculation, reduced desire
- Changes in the semen: thick, yellow, lumpy, or with blood
- Ultrasound: heterogeneous tissue, areas of increased blood flow, calcifications, dilated seminal vesicles; the gland may still be small
- PSA raised out of proportion to the size of the gland
Late stage: the enlargement dominates
- Usually over 60, symptoms creeping up over years
- Mostly obstructive symptoms: weak stream, straining, residual urine, nocturia
- Pain and burning may have faded, or were never taken seriously
- Sexual function “normal for the age”, which often means slowly declining
- Ultrasound: an enlarged transition zone and side lobes, usually with the scars, calcifications and blocked ducts of old inflammation underneath
- PSA roughly in keeping with the volume of the gland
At the late stage the inflammation is usually still there, and it must be found and treated before any decision about surgery: it changes the symptoms, the result of the operation and the surgical risk. Read how we diagnose chronic prostatitis and how it is treated.
How an enlarged prostate is diagnosed
- History and digital rectal examination. Size, consistency, symmetry, tenderness. An inflamed gland is tender and often uneven; a cancer is hard and irregular; a long-standing enlargement is smooth and elastic.
- Uroflowmetry. An objective measurement of the flow rate and its pattern. It shows obstruction long before a man would call his stream weak, and it is how we follow the effect of treatment.
- Ultrasound of the kidneys, bladder and prostate. Volume of the gland, the median lobe, thickness of the bladder wall, residual urine after voiding, stones, and any dilatation of the kidneys.
- Transrectal ultrasound with colour Doppler. The only way to see inside the gland: inflamed areas with increased blood flow, calcifications, blocked ducts, dilated seminal vesicles, and the exact volume. This is the examination that separates “enlarged” from “inflamed and enlarged”, and it is where the standard BPH work-up usually stops short.
- PSA, urine analysis and cultures. PSA is read in context: inflammation raises it, and it falls when the inflammation is treated. Cultures of urine and prostatic fluid identify the microbes. See our full diagnostic work-up.
Treatment of an enlarged prostate
Here are the standard options, named honestly, and then our approach. The two are not mutually exclusive: the standard drugs can be used alongside treatment of the prostatitis, and often become unnecessary as the gland shrinks.
Watchful waiting and habits
Mild symptoms with no residual urine can be observed: less fluid in the evening, fewer diuretic drinks, regular ejaculation, treating constipation, yearly reassessment. Waiting is reasonable only if someone has actually checked that the gland is not inflamed.
Medication
Alpha-blockers (tamsulosin, alfuzosin, silodosin) relax the muscle of the prostate and bladder neck and improve flow within days. 5-alpha-reductase inhibitors (finasteride, dutasteride) shrink larger glands over months. Tadalafil helps both flow and erections. All treat the symptoms; none of them treats the infection and inflammation underneath.
Surgery and minimally invasive procedures
Transurethral resection (TURP), laser enucleation (HoLEP, ThuLEP), laser vaporisation (PVP / GreenLight), water-vapour therapy (Rezum), the prostatic urethral lift (UroLift), Aquablation and prostate artery embolisation (PAE). They remove or reshape tissue; they do not remove the reason it grew.
We treat the enlarged prostate by treating the chronic prostatitis that, in our view, caused it: identifying the microbes, delivering treatment into the gland itself, clearing the blocked ducts and softening the fibrotic tissue. This is the Georgiadis Protocol for chronic prostatitis, and the volume reductions above are its measured effect on enlarged glands. Alpha-blockers or other drugs can accompany it when needed. We consider surgery only for men over 75 who are not able to follow a treatment of the prostate itself, and for genuine emergencies where the bladder or kidneys are already in danger. For everyone else, the question of surgery usually disappears once the inflammation is gone.
Prostate size by age: what is normal?
What the textbooks say
A young man’s prostate is quoted at 20 to 25 ml, growing slowly through the forties and fifties; 30 to 40 ml is called “common after 60” and glands of 60, 80 or 100 ml “not rare” in the seventies and eighties. Radiologists routinely write “enlarged for age” or “normal for age” on this basis.
What we say
A healthy prostate measures under 20 ml, and stays there; many of our younger patients finish treatment with a gland of 8 to 15 ml. In our patients, a 35 ml prostate at 38 is not “slightly enlarged for his age”; it is a gland that has been inflamed for a decade. A 45 ml gland at 65 is not “normal ageing” either. Whoever has a large prostate has, in our opinion, had inflammation left in place for a long time. And a 15 ml gland can be badly inflamed: the internal changes matter more than the number.
Weak stream, nocturia, “enlarged prostate” on a scan?
Send us your symptoms and any ultrasound, flow or PSA results. We will tell you whether this looks like a late-stage inflamed gland, what stage it is at, and what can realistically be recovered.
Natural treatment, diet and supplements for an enlarged prostate
Saw palmetto, pumpkin seed, pygeum, beta-sitosterol, lycopene
These are widely sold and heavily advertised. In controlled studies their effect on urinary symptoms is modest at best, and none of them shrinks an enlarged gland or reverses obstruction. They are harmless in most men, and they are not a treatment.
Foods, spices, alcohol and caffeine
Spicy food, alcohol and caffeine irritate an inflamed prostate and bladder and are worth limiting; tomatoes, oily fish, nuts, pumpkin seeds, green tea and plenty of vegetables are sensible for the prostate and for everything else. Read which foods are good for the prostate. But no diet, and no pineapple or apple, treats the infection inside the gland.
The most effective “natural” way to shrink an enlarged prostate is to find out why it is enlarged and to remove the cause. Diagnose the prostatitis thoroughly, treat it thoroughly, and let the gland recover. Everything else is at best a supplement to that.
What happens if an enlarged prostate is left untreated
Bladder and infection
A bladder that never empties becomes thick-walled, irritable and eventually weak and stretched. Stagnant urine breeds infection and stones. Acute urinary retention, the sudden inability to pass urine at all, is a painful emergency that needs a catheter.
Kidneys
Back-pressure dilates the ureters and kidneys and, over years, quietly reduces kidney function. This is the outcome that early diagnosis exists to prevent, and one more reason not to wait for symptoms to become “bad enough”.
Add to this the complications of the untreated inflammation itself: erectile dysfunction, infertility, chronic pain, and a lifelong relationship with antibiotics. Read the long-term effects of chronic prostatitis.
Frequently asked questions about enlarged prostate
At what age should I have my prostate checked?
Standard advice is a yearly check from 50, or from 45 with a family history of prostate cancer. Our advice is different: prostatitis starts from the mid-twenties, and we have treated symptomatic men from 18 to over 85. Have your prostate examined at the first symptoms, at any age: burning, frequency, a change in the semen, pain after sitting or ejaculation, a weaker erection. The earlier the inflammation is treated, the faster and more completely the gland recovers.
Can an enlarged prostate cause erectile dysfunction?
A simply enlarged gland does not. An inflamed one does, and very often: chronic prostatitis damages the nerves and vessels that pass through and around the prostate, and weakens the pelvic-floor muscles that hold an erection. If your “BPH” comes with weaker erections or premature ejaculation, the inflammation is the common cause of both. Read about sexual dysfunction and the prostate.
Can an enlarged prostate cause pain in the testicles, groin or legs?
Not by its size. Pain in the testicles, groin, perineum, lower back or legs, tingling, or burning in the urethra comes from inflammation of the prostate and seminal vesicles, which share their nerve supply with these areas. If you have “BPH” and pain, ask for a transrectal ultrasound with Doppler. See testicular pain.
Can an enlarged prostate shrink or go back to normal?
Yes, when the enlargement is inflammatory, which in our experience it usually is. In our patients with a gland of 30 ml or more the average reduction over a course of treatment was about a third, up to 83% in the best case, and half of them finished below 30 ml. The reduction was maintained in men re-measured years after stopping treatment. Hormonal drugs shrink the gland somewhat while they are taken; treating the inflammation shrinks it and keeps it there.
Is a prostate of 12 to 20 ml normal?
A healthy prostate is under 20 ml, and many of our younger patients finish treatment at 8 to 15 ml, so by size, yes. But size never rules out prostatitis. We see many young men with a 12 to 20 ml gland that is full of blocked ducts, calcifications and inflamed tissue, whose symptoms have been dismissed for years because “the prostate is not enlarged”. The inside of the gland matters more than its volume.
What is the median lobe of the prostate, and why does it matter?
The median lobe is the part of the gland that can grow upwards into the bladder. Even when small it acts like a ball valve at the bladder outlet, causing obstruction, incomplete emptying and urgency out of proportion to the overall size of the prostate. It is measured on ultrasound and influences the choice of treatment.
Does an enlarged prostate raise PSA?
A larger gland produces somewhat more PSA, and inflammation raises it further, often sharply. A PSA that is high for the size of the gland points to inflammation (or, rarely, cancer) and must be explained, not just watched. In our patients PSA typically falls as the inflammation is treated.
Does an enlarged prostate lead to prostate cancer?
BPH itself does not cause cancer: it grows in the transition zone, while cancer arises mainly in the peripheral zone. Chronic inflammation, on the other hand, is increasingly linked to prostate cancer, which is one more reason to identify and treat it. Read chronic prostatitis and prostate cancer.
Can an enlarged prostate be treated naturally?
Plant extracts such as saw palmetto have at most a modest effect on mild symptoms and do not shrink the gland. Habits help more: less fluid and alcohol in the evening, less caffeine and spicy food, regular ejaculation, treating constipation. None of this replaces finding out whether the gland is inflamed and treating it; that is what actually shrinks it.
