The stream weakens gradually enough that most men cannot say when it started. It takes longer, it splits or sprays, it stops and restarts, and eventually there is a sense that the bladder never quite empties. Because this is the same picture people associate with an enlarged prostate, it is frequently attributed to age and left for years — sometimes treated with prostate medication that does nothing, because the obstruction is not in the prostate at all.
Urethral stricture disease is scarring within the urethra, the tube carrying urine from the bladder out through the penis. Scar tissue contracts, the channel narrows, and the flow reduces. It is more common in younger and middle-aged men than prostate enlargement is, which is one reason a weak stream in a man in his thirties or forties should not simply be assumed to be prostatic.
Where Strictures Come From
Several causes account for most cases. Trauma is a major one: a straddle injury from a bike frame, a fall onto a bar or beam, a pelvic fracture from a vehicle or industrial accident. The injury may have occurred decades before the symptoms appear, and men often do not connect the two.
Instrumentation is another. Catheterisation, particularly a prolonged or difficult one, and previous urological or prostate procedures can leave scarring. Infection, historically gonorrhoea and now less commonly so, produces inflammatory strictures. Lichen sclerosus, an inflammatory skin condition affecting the foreskin and glans, causes a particular pattern of stricture and needs recognising because it behaves differently. A proportion of strictures have no identifiable cause.
Left untreated, a stricture does more than inconvenience. Incomplete emptying leads to recurrent urinary infections, bladder stones, and progressive strain on the bladder muscle, which does not fully recover once it has been overworked for long enough. In severe cases the back pressure affects the kidneys. Complete inability to pass urine is a medical emergency requiring immediate attention.
How It Is Diagnosed
The history often points the way, particularly a past injury, catheter or procedure. Flow rate testing measures the stream objectively and typically shows a characteristic flattened pattern. A post-void bladder scan shows what is left behind.
Defining the stricture itself requires imaging or direct visualisation. A retrograde urethrogram, in which contrast is instilled and X-rays taken, shows the location, length and number of narrowed segments. Cystoscopy allows direct inspection. These details matter more than they might appear to, because the choice of repair depends almost entirely on where the stricture is and how long it is.
Repair Options and Why the Choice Matters
Two broad approaches exist. Endoscopic treatment — dilation, or internal urethrotomy in which the stricture is cut from inside — is quick, minimally invasive and requires no incision. It also has a high recurrence rate, particularly for longer strictures and after a first attempt has already been made. Repeated dilations tend to produce more scarring and can make a definitive repair harder later.
Urethroplasty is open surgical reconstruction: the narrowed segment is excised and the ends rejoined, or the urethra is widened using a graft, most often tissue taken from the inside of the cheek. It is a larger operation with a longer recovery, and it has substantially higher long-term success rates. For a short stricture in a suitable location, an excision and reconnection has a particularly good record.
The reasonable summary is that a single endoscopic attempt is a defensible first step for certain short strictures, while a recurrent stricture is usually better served by reconstruction than by another dilation. That decision is worth making deliberately with a urologist rather than drifting into a cycle of repeated procedures.
Dr. Raymond Nash assesses urinary flow problems and urethral conditions at Grande Prairie Men’s Medical Clinic, including men who have already had dilations elsewhere. Appointments are available at gpmm.clinic or by phone at (587) 416-8296. The information above is general and does not replace an individual urological assessment.