Urinary symptoms related to a benign enlarged prostate, or BPH (Benign Prostatic Hyperplasia), are among the most common health issues faced by men as they age.
The likelihood of developing BPH increases steadily over time, and while it is a natural part of ageing, understanding why it occurs and how it affects the urinary system can help men make informed decisions about their health and treatment options.

BPH is a non-cancerous (benign) enlargement of the prostate gland. The prostate is a walnut-sized organ that forms part of the male reproductive system. It sits directly below the bladder and surrounds the urethra — the tube that carries urine out of the body.
The prostate’s main function is to produce part of the fluid that nourishes and transports sperm.

As men age, the prostate gradually enlarges, particularly in its central (transitional) zone. Because the urethra passes through the centre of the gland, any increase in prostate size can cause narrowing of the urinary channel.
This restriction acts like a clamp on a hose, making it harder for urine to flow freely from the bladder. The bladder must then work harder to empty, eventually becoming thicker, less elastic, and more irritable over time.

As the bladder compensates for the narrowing, a variety of urinary symptoms may appear, collectively known as Lower Urinary Tract Symptoms (LUTS).
Common symptoms include:

These symptoms often develop slowly and can be mistaken for normal ageing. However, when they interfere with sleep, comfort, or daily activities, medical assessment is recommended, as effective treatments are available.

BPH is extremely common.

Although the condition is benign, untreated BPH can lead to complications such as urinary retention, recurrent infections, or bladder damage.
Fortunately, modern medical and minimally invasive surgical options allow most men to achieve excellent long-term outcomes.

The exact reason why the prostate enlarges with age isn’t completely understood, but several key contributing factors are well recognised.

Age is the most important factor. The prostate is highly sensitive to male hormones, particularly testosterone.
During puberty, testosterone drives prostate development to its adult size. Throughout adulthood, the gland continues to respond to testosterone exposure.

Even though testosterone levels slowly decline after the age of 40, the cumulative exposure to this hormone over decades causes gradual cellular hyperplasia (increased number of cells) in the prostate’s central zone.
This process is benign but leads to progressive enlargement and obstruction of the urinary outflow tract.

Inside the prostate, testosterone is converted by the enzyme 5-alpha-reductase into a more potent form — dihydrotestosterone (DHT).
DHT binds to receptors in prostate cells and stimulates growth. Elevated or prolonged DHT activity contributes to continued enlargement throughout life.

This biological pathway is also the target of a medication group known as 5-alpha-reductase inhibitors (such as finasteride or dutasteride).
These drugs block the conversion of testosterone to DHT, and over 6–12 months of treatment can shrink the prostate by 20–30%, improving urinary symptoms and slowing disease progression.

Genetics play a significant role. Men with a family history of prostate enlargement — for example, a father, brother, or grandfather who developed symptoms early — are more likely to experience BPH themselves and often at a younger age.
Research suggests hereditary patterns may affect hormone sensitivity and cellular growth regulation within the gland.

Increasing evidence links BPH with lifestyle-related conditions.
A cluster of metabolic disorders — known as metabolic syndrome — is associated with obesity, high cholesterol, elevated blood pressure, and impaired blood sugar control.
These conditions create a chronic, low-grade inflammatory environment that can influence prostate growth.

Men who are overweight or who have diabetes are more likely to experience faster prostate enlargement and more severe urinary symptoms.
Adopting a balanced diet, maintaining regular exercise, and managing weight and blood sugar can help reduce this risk and support better bladder function.

Another contributing factor is chronic inflammation within the prostate tissue.
Inflammatory processes release cytokines and growth factors that can stimulate prostate cell proliferation and irritate nearby structures.
This can worsen both enlargement and urinary symptoms over time.
Conditions linked with inflammation — such as metabolic syndrome or repeated urinary infections — may accelerate this process.

The good news is that BPH is treatable and manageable.
The first step is recognising the symptoms and seeking professional advice.
Treatment options depend on the severity of symptoms and how much they interfere with daily life. These may include:

Early assessment helps prevent long-term bladder damage and allows tailored treatment to restore comfort and quality of life.

Benign Prostatic Hyperplasia is one of the most common and treatable conditions affecting men.
While ageing is inevitable, the symptoms of BPH do not have to be accepted as “just getting older.” Understanding the hormonal, genetic, and lifestyle factors involved can empower men to make proactive choices that protect urinary and prostate health.

If you’re experiencing changes in urinary habits — such as slow flow, getting up at night, or incomplete emptying — speak with your GP or contact The Prostate Clinic for assessment and advice.

Until next time — take care of your prostate.